Moviepass is an all you can eat subscription. The UK has those - Cineworld and Odeon both do them. But the point is that they're significantly more expensive than Moviepass is, and the price of quite a few individual tickets (they're usually £35/40pm, which is $50-60 US). And they're run by the chains themselves so they have less infrastructure cost to check for fraud.

That's what I meant by integer multiples. If Moviepass was $60 a month it might be sustainable. But it's not, it's $10.