No, no ownership is being conferred except to a number, the supporters club key let's call it. That is what you are buying, it's like an NFT. And just like NFTs it's being marketed as though you are purchasing the work itself which you absolutely are not doing. You are paying for the right to say you paid.
If you don't pay you are in exactly the same state as if you paid regarding your license to use the software, it's licensed to you under the terms of the agplv3. If they were selling a support contract that would be fine too, but again, no, you get no extra support over what anyone posting a issue on the tracker will get. Even if it were a support contract then it should be made clear that is what you buy.
Technicality of usage rights is very relevant, framing as a purchase where it actually isn't is dishonest and the fact that they make more money being dishonest doesn't make it right. Other than that you used an awful lot of words to basically agree with me.