The problem is that if you take this too far, nobody knows what it costs to go to the movies, so everyone will just stick the "high cost" in their mind, and not go.
This is why they always gravitate to "$5 before noon/4pm" or "$5 Tuesdays" or similar things that are easy to remember.
I'm waiting for them to have the best seats in the house be the large armchairs for $20, and the rest of the shitseats be normal stadium seating for $5.