Honestly, I don't get it.
I pay 25$ for my gym membership per month. It's dirty, hardcore, oldschool gym in Cracow, prolly last one in whole city. Gym is basicly falling apart, equipment is older than me and they haven't bought anything new since Borys Jelcyn's election. Sometimes you have to wait for equipment... It's one of the cheapest if not THE cheapest gym in Cracow. For more "exclusive" gym you have to pay like 60-70$ per month.
So planet fitness is in USA, where everything is more expensive, especially buildings and so on. You pay 10$ per month for huge gym which is clean, they give you ton of shit for free and you can sign out whenever you want.
Please tell me how exactly do they fucking prosper. How is that possible?