To be clear, you're saying people should only pay to read a book, see a movie, etc, if they end up liking it?

Sure. It's a tip for an entertaining evening. A gratuity for an excellent performance, if you will. The shame in it is how bad the deal is for the author. I'd much rather send the author/director/lead actor/whoever a "check for $12" myself and cut out the insane distribution scheme. But that's hard to do.

Which is not what he was saying nor the OP. The OP was saying you have to leave your religion if one person or even a substantial group of people who claim to be of your religion does something you don't like.

False. The OP said that if the group is heading in an objectionable direction, dissenters should leave or risk their membership being counted as tacit approval. If the leadership of the organization explicitly or tacitly endorses the objectionable behavior, and you can't change it, it's probably time to go.

It's not important if there's a kook who can claim membership but acts in a way contrary to the organization. You scorn the person, council the person, kick them out, whatever. If you're the oddball though, and the organization is the one being nasty, your continued membership in that case becomes a tacit approval of the problem.