No third-party matching, no approval to anyone else's contract. Listing and filling both happen inside this single contract: the seller gets 97%, 3% goes to the treasury. This page reads from and sends transactions to this contract only.
There is no referral programme in this contract. The 5% royalty is declared through royaltyInfo() (ERC2981), so external marketplaces that honour the standard will pay it to the fee recipient. The 3% is only taken when a listing is filled here, inside the contract — plain wallet-to-wallet transfers cost nothing.
Mint revenue accrues to the contract and is withdrawn by the owner to the fee recipient address. Nothing is distributed to holders — no dividends, no buyback, no floor.