Gosh - I looked at these as I was unfamiliar with them, but why one would want to add these to an ecommerce site like Abantecart provides is not clear to me. The Gumroad and Selz both come with their own carts, and the fee of 5% +transaction fee is quite high.
The Ribbon seems also seems useless for an ecommerce site as it is a payment transfer option - and would seem to be more appropriate for non-commerce transactions.
I am sure if I have may have misunderstood what these sites offer - some one will correct me. But if I am correct, they do not seem to be enhancements to this great ecommerce platform IMO.
Lee
