Well for a specific example, Sad Frogs District released, sold out within minutes, and had a floor price of 1+ ETH over the course of a week and a half or so. Only problem was they were basically rare pepes and Matt Furie is an idiot, so he filed a DMCA with OpenSea and had them delist the Sad Frogs District project. SFD fired one back and were eventually reinstated when Matt Furie dropped his DMCA. OpenSea, of course, sucks balls, but it's what exists right now.
Some NFTs you own all the rights to, some you don't have any rights to, it really depends on the project.