it's just like if you have a business, and you accept credit cards. you loose a percentage of the sale to master card, visa, or whatever card it is. just take note though. if they say you have to spend $x.xx to use your cc they could loos there machine if they get turned in. they have to let you use it for any amount if they want to keep the privilege of using there machine.
cx2, mcx, T Rex 450 SA, GAUI 550, walkera cb100, 4#6, 4#6S, 4g6S, trex 450 clone, DX7
never hold your farts in. they travel up your spine, and that's where s****y ideas come from.