Dove Men+Care rebuilt its product line and needed credible voices in the fitness community to announce it. Instead of buying Instagram reach, the brand partnered with Strava—the GPS tracking app used by 120 million runners and cyclists—to identify and seed athletes who actually log miles, according to Marketing Dive. The campaign drove a 14% lift in purchase intent among the target demo.

The brand selected athletes based on Strava activity data: frequency of workouts, consistency over months, engagement with the platform's social features. Dove then sent reformulated deodorant and body wash to these users, asking them to post about the product in the context of their training routines. The seeding ran alongside paid social on Instagram and TikTok, but the Strava cohort delivered higher engagement rates and lower cost-per-impression than the paid placements, per the report.

This worked because the selection filter was behavioral, not vanity. A runner who posts 40 activities a month and responds to comments has a tighter circle than a macro-influencer with 500,000 followers. The Strava audience trusts peers who share split times and gear reviews more than they trust celebrity endorsements. Dove positioned the reformulation—improved sweat protection, skin-friendly ingredients—inside the vernacular of training: "stayed dry through a 10K in July heat." The testimonial format was native to the platform, so it read as peer recommendation rather than paid placement.

A small physical-product brand runs the same play with $2,000 and two weeks. Pick a vertical platform where your customer already logs behavior: Goodreads for book accessories, Untappd for beer gear, Fishbrain for tackle. Search the public leaderboards for users in your geography with consistent activity and 100-500 followers—enough to have a voice, small enough to reply to a DM. Send 20-30 units with a one-page brief: use the product in your normal workflow, post once with honest feedback, tag us if you like it. No script. No usage rights demand. Track who posts, measure referral traffic and promo-code redemptions against your paid social baseline. If the conversion rate beats your Meta CPM, expand the list and build a quarterly seeding calendar.

The broader pattern: platforms with built-in proof-of-work make better influencer sources than Instagram's follower graph. Strava has your run history. GitHub has your commit log. Steam has your playtime. These signals cost nothing to access and predict advocacy better than engagement rate. Dove paid for media planning and fulfillment logistics, but the insight—find people who already do the thing—is free.