Market Place & 1000s of Affiliates ready to promote your product, ClickBank is more bigger the PayDotCom
I actually have good success with Paydotcom. I do admit that CB has a lot more offers but I sell a product on Paydotcom and did not want to pay the upfront fee.
you can list tons of products on pdc and it won't cost you anything upfront. Only a small percentage per sale.