Mint

Make an HTS collection with a royalty, then mint into it. Hedera charges that royalty on every sale of every NFT in the collection, on any marketplace, not only this one.

Paid to your account by the network on every sale.

Charged to the receiver when an NFT moves with no HBAR paid, so a sale cannot dodge the royalty as a "gift".

Hedera charges about $2 to create a token with a royalty. This sends 50 HBAR and the contract returns what the network does not keep, in the same transaction.