Yeah, his works are definitely tech demos more than anything. Nothing wrong with that on its own though, as this method is used by studios who pitch proof-of-concepts to publishers, its simply the MANDATORY payment for access that makes him a shitty dev. "Pay what you want" donations would still be questionable but that would be far more acceptable. Honestly I couldve done the same monetizing shit with my fan work (to then do MORE fan work since I'm getting paid) but specifically chose not to for one simple reason: its fucking wrong. I don't own the IPs.