WHY do movie theaters sell popcorn? For every popcorn eater | Why?

WHY do movie theaters sell popcorn?

For every popcorn eater, the owner of the buffet earns about 400 to 700% profit. Also, keep in mind that popcorn makes people thirsty and makes them buy more drinks. And another significant fact is that it can be stored for a really long time.

Therefore, buffet owners decided long ago that this product would be the most profitable.