Not a bad idea. As a site owner, I prefer to have my checkout branded as my site. I'm not a fan of the paypal experience. It feels cheap. However I certainly understand that people prefer paypal over stripe or other payment systems. To say "use our checkout system, or pay with paypal" would be fine if the site owner wants to support it.

I've had a lot of people ask about integrating other payment platforms into Pay Pad. I'd love to build Pay Pad in a way that was platform agnostic. Just choose your payment provider/gateway and you're off.

We'll see what happens. If enough people want it, I'll do it I'm sure.