I haven't been here long, but wcbrandes posts have always seemed sincere and not derogatory or condescending. He's been here for three years so it's obvious he loves pinball.
I really don't think he's trying to rip anybody off. After reading most of this thread, I think he's actually trying to help. Sure, it could be read one way as trying to make some cash off the backs (or out of the wallets) of others, but I doubt the return would be worth the effort. If it were me, I wouldn't sign the 'do not sue' contract, but I'd wait until Pintasia asks for money.