It turns out many processors (like Paypal) don’t want to deal with products that have any relation to ‘Adult’. Even though this is a software plugin that imports data from adult video sites into WordPress, that’s enough to make many processors nervous.
Luckily the folks at CCBill are adult friendly and were willing to be the biller for this product, as link as I didn’t show or link to any explicit material on the site.
I had to customize a new gateway for CCBill, but I’m very happy I was able to integrate their billing solution into the MarketPress eCommerce plugin I’m using from WPMU Dev. It just took a little longer than I originally thought.