Hello99: I agree to your premise based on many poskim that there is “ownership” of ideas. But I do not accept that you understand logically WHY you would be oiver on gezel. Just because you have ownership over something, doesn’t make anything in this case “stolen”. There was nothing taken, nothing to return, no loss applied to the victim. By the same logic that you still haven’t explained, it would be assur to listen to music being played on someone else’s speaker, because at the end of the day, you don’t own the music, Shwekey or MBD does.
Also, you assume that over here there would an Issur gezel because even something worth less than a pruta you would be oiver on. I disagree, because the pruta is only an amount to be chayav ben adam lechavero, and anything less is not. But that doesn’t mean that something less than a pruta has no value at all, rather anything less than a pruta has value and is thereby considered gezel and you are thereby oiver on gezel, but the punishment for it is unenforceable. By music, you did not steal anything of value, not even less than a pruta, as anyways you would have never purchased it, hence you weren’t oiver on gezel. According to your logic, if someone was able to patent oxygen for breathing, we would all have to suffocate ourselves if stealing was a hereg ve’al ya’avor.