Rank21: A fixed-supply AI leaderboard where early boosts go further

Hey Product Hunt — I’m Evan, a solo maker, and I built Rank21 because most leaderboards hide the thing that actually decides who gets seen. Rank21 takes the opposite approach: every position is openly sponsored, every boost is backed by a completed payment, and the ranking rule is public. Here’s how it works: - Add an AI product URL or X handle. - Pick a target rank and a whole-dollar boost. - Review the estimated rank and RP before checkout. - Completed boosts receive Rank Power; more active RP ranks higher. RP has a fixed maximum supply of 21 million across 10 eras. Each era contains 2.1 million RP, and every new era gives half as much RP per dollar. Earlier boosts therefore receive more placement weight for the same amount. To be explicit: RP is not a cryptocurrency, security, or investment. It stays inside Rank21 and cannot be traded, withdrawn, exchanged, or redeemed. A paid rank also does not imply product quality or guarantee traffic, sales, backlinks, or SEO results. New listings start at $5. I’d especially value feedback on two things: is the fixed-supply mechanism understandable on the first visit, and what additional transparency would you want before sponsoring a listing? Thanks for taking a look.