No one is going to be stuck eating SPAC tickets because they can’t sell them; no one with half a brain (and I’d make an argument about those refusing vaccines without a real medical reason) is going to be “punished monetarily”
This is raging just to rage. Simple solution - get the vaccine; it’s free/safe/effective. If you don’t want to, that’s your choice. But choices have a range of consequences. In this case, that includes the venue not letting you in. You get to exercise your freedom of choice, as does the business. That’s how it works and it’s good to have both entities with that freedom.
If anyone decides that a vaccine requirement means they will have to skip SPAC, and cannot find a way to recoup their ticket money, they are dumb on multiple levels.