Found this, I think that has to do with royalty
Rarible is a marketplace aiming to link sellers (typically content creators such as digital artists, model creators or meme makers) with buyers who can select pieces they wish to purchase.
To turn their work into an NFT, creators must first “mint” a token using Rarible’s software. To do so, they fill out a form on the website and attach their image and other data, such as a listing price, that represents their work.
The Rarible platform then creates a new token on the Ethereum blockchain. Similar to other tokens on Ethereum, the NFT can be transferred between wallets using Rarible’s software.
Rarible leverages the Ethereum blockchain to embed within an NFT’s code the full history of its owners and transactions. Of note, when a transaction goes through, both the buyer and the seller have to pay transaction fees that go to the Rarible network.
Royalty payments
One interesting feature of NFTs is the ability to program royalties, or the rights to future cash flows, within these assets. This means that creators on Rarible can set a percentage of future sales and collect them automatically by issuing a token.
This is a major feature drawing creators to this technology, because unlike with traditional content platforms, NFTs can be designed to pay out royalties immediately.
For instance, if a piece of digital art listed a 10% royalty, the creator would receive 10% of any consequent sale of that art.