Ass Auction is an ad network with one placement: a pair of boxers. Pay $5 or more and your logo joins the leaderboard at whatever rank your money buys. Anyone can pay more and push you down. Your total spend is your rank, so climbing back only costs the difference. The top 22 get worn on the boxers. No accounts, just a URL or @handle, and Stripe. Live click counts, a share card, an email when you get knocked down, and a gossip bar where the crowd talks.