Discovery surfaces apps that are already used. Bounties get the first users in the door — paid in the project's own XP, gated on coming back, and walled off from the rank so no one can buy their way up.
Projects pay in their own XP or token — never cash from an escrow we hold. No custody, no prize-pool problem. Free to issue, valuable only if they succeed.
We never pay for “you opened the app.” We pay for coming back. Farmers optimize one-and-done; retention gates make farming cost more than it pays.
Bounty wallets are tagged at claim time and can't move the rank until they return unpaid and organic. Bounties fill the funnel; only real retention ranks.