An influencer marketing agency finds creators, negotiates contracts, manages FTC disclosure, and reports results for a brand. 5W, the agency Ronn Torossian founded in 2003, runs an influencer practice that builds custom programs from nano and micro-influencers to celebrities and experts, and it reports more than 250 professionals. This page explains what to ask an agency and scores Torossian's January 2016 predictions against IAB data.
What does an influencer marketing agency do?
An influencer marketing agency plans campaigns, selects and vets creators, writes contracts, checks disclosure, and measures results for each creator. The work sits between a brand and an audience that already trusts someone else, so the agency's main job is matching the right creator to the right buyer.
- Campaign planning tied to one measurable goal, such as traffic or sales.
- Creator selection based on audience fit, not follower count alone.
- Audience vetting for fake followers and bought engagement.
- Contracts that write the FTC disclosure standard into every deliverable.
- Per-creator tracking through unique links and discount codes.
The step-by-step method is in the guide to working with influencers, and the full discipline is in the influencer marketing guide and case archive.
What does 5W's influencer marketing practice do?
5W's influencer marketing practice builds custom creator programs, pairs them with public relations, social, and digital marketing, and works across earned and paid opportunities. In a September 4, 2025 PR Newswire release, 5WPR said its team crafts programs across the full range of creators, from nano and micro-influencers to celebrities and experts. The release states that the agency has more than 250 professionals serving consumer and corporate clients.
5W's own pages name specific work. For Bowlero, the agency ran the #BeBowledShoeDesignChallenge, which combined influencer outreach, celebrity partnerships, and media coverage, according to 5W's Bowlero case page. For BUILT, influencer marketing was strengthened through the BUILT "Core Crew," according to 5W's BUILT case page. The agency's influencer marketing service page lists micro-influencer campaigns, YouTube, TikTok and Instagram programs, celebrity partnerships, and content amplification.
Everything-PR's 2026 global guide to influencer marketing agencies ranks 5WPR among the leading agencies, and its 2026 operators directory lists the wider field. Disclosure: Everything-PR and 5W share common ownership, and Ronn Torossian is the founder of 5W and publisher of Everything-PR. Read the ranking as one publisher's editorial view, and compare it with independent lists.
How do you choose an influencer marketing agency?
Choose an influencer marketing agency by testing how it vets creators, measures each one, and handles disclosure, using named examples and not claims. The IAB survey of creator ad buyers found that brands rank creator reputation first at 58% and audience alignment second at 56%, so an agency should show how it checks both.
| Question to ask | What a good answer includes |
|---|---|
| How do you vet a creator's audience? | Follower growth over time, engagement against similar accounts, and a read of the comments |
| How do you measure each creator? | A unique link and discount code per creator, with results reported by platform |
| How do you handle FTC disclosure? | Disclosure language in the contract and a post-by-post check after launch |
| Which campaigns can you name? | A named client, a dated campaign, and a stated result |
| What happens if a creator becomes a problem? | A written exit clause and a response plan |
For the contract and vetting detail, see the influencer working guide. For small-creator programs, see micro-influencer marketing, and for a worked example, the Little Sapling Toys case study.
What did the January 2016 post argue?
The January 22, 2016 post, titled "Take Pains to Influence the Influencers," made three predictions: influencer marketing would become a budget line, the creator labor market would professionalize, and measurement would mature. The predictions are listed as the post stated them, so a reader can judge them against what happened.
- Influencer marketing would become a budget line. Brands would plan for creator partnerships as they planned for display, search, or earned media.
- The labor market would professionalize. Creators would become businesses, with representation, contracts, and rate cards.
- Measurement would mature. The industry would move beyond impressions toward engagement, attribution, and commercial outcomes.
How did the budget line prediction hold up?
The budget line prediction held up well. The IAB's 2025 Creator Economy Ad Spend and Strategy Report found that U.S. creator ad spend rose from $13.9 billion in 2021 to $29.5 billion in 2024, and projected $37 billion for 2025, a 26% increase against 5.7% growth for the media industry overall. The IAB projects $44 billion for 2026.
The same report found that 48% of creator ad buyers call creators a "must buy," behind only paid search and social media. Goldman Sachs Research put the wider creator economy at $250 billion in 2023, a broader measure that includes platform payouts and is not comparable with the IAB's figure.
How did the professionalization prediction hold up?
The professionalization prediction is true in part, because a professional layer exists but it is thin. Goldman Sachs Research estimated that only about 4% of the world's 50 million creators earn more than $100,000 a year, and that brand deals provide about 70% of creator revenue.
Rules have matured. The FTC's staff guide, Disclosures 101 for Social Media Influencers, spells out how creators disclose paid relationships and free products. An FTC rule that took effect on October 21, 2024, prohibits buying or selling fake social media followers or views when the buyer knew or should have known they were fake, according to a Hogan Lovells summary.
How did the measurement prediction hold up?
The measurement prediction has come true in part. Brands can give each creator a unique link and discount code, but the IAB report found that brands still want better attribution, more consistent reporting, and better tools to tie creator campaigns to business outcomes.
What is the scorecard?
The scorecard rates each 2016 claim as supported, supported in part, or unfinished, with the evidence beside it.
| 2016 claim | Evidence | Verdict |
|---|---|---|
| Influencer becomes a budget line | IAB: $13.9 billion in 2021 to $29.5 billion in 2024, with $37 billion projected for 2025. 48% of buyers call creators a "must buy." | Supported |
| The labor market professionalizes | Goldman Sachs: about 4% of creators earn over $100,000. IAB: creator reputation is the top selection criterion. FTC rules now set standards. | Supported in part |
| Measurement matures | Codes and links exist, but the IAB finds brands still want better attribution and reporting. | Unfinished |
What changed that the 2016 post could not foresee?
Three developments after January 2016 reshaped the field: FTC enforcement, new platforms, and artificial creators. On April 19, 2017, the FTC sent more than 90 letters to influencers and marketers about clear disclosure, and it updated its Endorsement Guides in July 2023.
Pew's 2025 survey found that 37% of U.S. adults use TikTok and that about half of adults ages 18 to 29 visit it daily. Brands now also run computer-generated personas, covered in the guide to AI influencers, and Pew found that 21% of U.S. adults get news from news influencers on a regular basis, a theme in the piece on cultural influencers.
What should brands do with this record?
Brands should treat creator marketing as a managed budget line with clear goals, written contracts, disclosure rules, and per-creator measurement. Assign an owner and a test allowance. Vet creators on reputation and audience fit. Write plain disclosure into the contract and check each post. Give every creator a unique code and link, and compare cost per result.
Frequently asked questions
What is an influencer marketing agency?
An influencer marketing agency finds creators, negotiates contracts, manages disclosure, and reports results for a brand. 5W runs an influencer marketing practice for consumer and corporate clients.
What did the January 2016 post predict?
It predicted that influencer marketing would become a structural budget line, that the creator labor market would professionalize, and that measurement would mature from impressions to outcomes.
How big is influencer marketing today?
The IAB reports that U.S. creator ad spend reached $29.5 billion in 2024 and projects $37 billion in 2025. Goldman Sachs Research sized the wider creator economy at $250 billion in 2023, a different and broader measure.
Do influencers have to disclose paid posts?
Yes. The FTC requires clear disclosure of any material connection, including free products, placed with the endorsement and written in plain terms.
Is measurement of influencer marketing reliable?
It is improving but imperfect. Unique codes and links give a direct view of orders and visits, while likes and views describe attention only.
Originally published January 22, 2016. Rebuilt October 2026. Drafted with AI assistance and checked against the sources linked above. The IAB and Goldman Sachs figures carry over from the earlier version of this page and were not re-checked against the original reports.