Hi Skeptic! "PayDollar" is one of our credit card payment processors, and it's the pre-selected option at the checkout page.
Do go ahead and checkout via PayDollar, and in case you have any problems with it you may simply try checking out using our other payment options -- for credit card we have a second processor (WorldPay), or you can use PayPal instead. PayPal processes payments via your PayPal account (if you have one) or credit card (doesn't require a PayPal account).
I hope this helps!