Never seen those, I guess it'd depend on the cost of the tickets? If it's anything more than, like, half of what a standard movie ticket is then I'd be kind of annoyed if I ended up not liking it, idk if that makes it a scam though.

No.

I'd never heard of Mystery Movies, but I'm guessing the people who view them know it's going to be a mystery, so the theater is being honest about what they're providing and providing something people want, or else nobody would be going to see them.

The only way they could be a scam is if they deliberately chose movies that are really crappy because their royalties are cheaper. And even then, it's only a scam if low quality is unexpected by audience members.

I don't know. Sounds good anyway.

Kind of. It's like a loot box. Or gambling.