Hello Squirtletoy555, KNXRB is the owner of FPSCIP, would be wise to find his thread and ask, but the payment methods used is for convienience and security, you wouldn't want to send a check in the mail or use western union and have them get the name wrong (as I have experienced)
FPSCIP does do what it is supposed to do , you get 1 free build code with your purchase, but you can build as many test builds as you want, they are watermarked of course, I would not use your build code until your absolutely satisfied with your game though.
My opinion on weather its worth it, I don't like the idea of buying extra build codes, but it does add a nice touch to MP games.
he's got something new going on right now (wrigley, spearmint or something I forget the name) I need to check that out again.

The way it's meant to taste.