How is it in any shape or form toxic? Also let’s just pretend that FiveM can’t block any given resource for any given reason if they so please. Even if this person isn’t advertising it with the FiveM brand, he has created a resource for their platform only, so no matter what way you look at it, selling a fivem server resource should be done through tebex.
Had this been, let’s just say, a 3D model. Then you would be 100% correct saying they can sell it outside of tebex without the fivem brand, since it’s not something that’s specific to their platform.
Either way - the person is selling other peoples work, editing the css and selling someone else’s work is what’s “toxic” if you ask me.