I am looking into buying XenForo, however, on my PayPal, I have BillMeLater set up where I can use it, however, I was wondering if you guys allow it because I get an error message each time. Thanks!
Yes as said, Bill Me Later is strictly on PayPal's side. It works basically just like a credit card. PayPal pays the company now and then bills you for payment later plus intrest and fees. As a merchant, there is no option not to accept it. If it errored, more then likely you were denied during the almost instant credit check PayPal does.