I think you mean UltimatePay.
It's a service run by Play Span and works as a normal e-tailer, ie. you buy Crysta use a one-off CC payment to do so, they in turn tell SE about your purchase and SE put the appropriate amount of Crysta into your SE account's 'pot'.
The BIG difference is that you don't have to create an account with PlaySpan, whereas you do with ClickAndCry.