The issue of that is that for the first month, between 40 and 90% of the ticket price goes directly to the studio (not to the cinema). Plus you pay (cheapest value for Frozen, English, 2D, 6 months after release) usually at least 8'000€ per week to rent the movie.
So the cinema has to somehow make money – and that is with ads and food.
So the cinema has to somehow make money – and that is with ads and food.