> Everyone else is just not using X-Payments ...
Well, according to
the stats we received from PayPal this statement is a bit wrong
Unfortunately, I can't publish distribution figures per product, but we see steep growth in processing via PayPal&X-Payments.
With regards to design flaws - yes, some of them our fault indeed and I am here to remove as many of them as possible, but we should take in account PA-QSA certification, too. We pay fees for any change that they consider vital. E.g. we added CVV field support for NetRegistry payment gateway integration and it costed us $500. Just a field in a payment form, no other changes.
Many things in X-Payments are caused by PA-DSS certification, too. E.g. we can't remove PIN codes as this is one of the requirements.
With regards to iFrame support for checkout - as I said in other thread here - we are to release improved iFrame for OPC and iFrame for FLC along with improved checkout routine in X-Cart itself. I hope to have this release during winter 2013.