NFTs are like those late-night commercials for star naming "registries". They have their own Access database of non-legally-binding names that people have given to stars. You can pay to be on the list and get a paper certificate that no one gives a shit about.
By the way there are (estimates vary) thousands of stars in the observable universe for every grain on earth, just as there are essentially infinite NFTs.
That's not true. At least in the case of BAYC the terms of use even give you a commercial license: iii. Commercial Use. Subject to your continued compliance with these Terms, Yuga Labs LLC grants you an unlimited, worldwide license to use, copy, and display the purchased Art for the purpose of creating derivative works based upon the Art (“Commercial Use”).