Not sure if he stopped doing it, but by the time i bought a Game Years ago, his finished Games use some sort of Anti Piracy, called "Piratetripper", doubt anyone cares to bypass it, but even better it´s really unfriendly for buying customers, like if i remember right just moving the folder to a different place can result in you being unable to play the Game anymore...
If this useless unfriendly Pirate Tripper wouldn´t be a thing i actually would care to buy some of his Games, but not as long as he uses this garbage anti cheat, it´s user unfriendly af and also feels and sounds shady af as well...