I've always wondered how an OP makes any profit with pins. Firstly, the cost is in the thousands to purchase said pin (ball park). Then, generally the charge is like .50 cents to play one game. It's takes a long time for that pin to pay for itself AND THEN start turning a slow profit.
Then you have money wasted on repairs, etc.
Just doesn't seem profitable in my opinion. I would tend to think arcade games are more reliable for the long haul.