Another idea to keep in mind that Payrange makes easier to do is having specials. Locally, East Side Pinball does this quite often where the pins are discounted (most recently Easter weekend).

You could do something across the board for regulars looking to save a bit, use payrange and get two for ones on Tuesday or something. Or for a limited time put the latest machine on 75c etc. Or even discount the pins for slow days to get plays up or whatever makes sense.

I'm a big fan of the concept of Payrange and hope it becomes more common but so far I haven't been impressed with the application (on Android). It's not difficult to use but frequently seems to have difficulties connecting. Haven't tried the update I saw just come out yet though so maybe that's all figured out now.