> But the payment processors are the unspoken guardians of internet commerce, and without VC level backing good luck getting them to touch something like adult content.

You're completely correct here. The only other real option in this space is CCBill - and they:

a) only do payments - not hosting and everything that OF does

b) still take a ~18-20% cut, in addition to annual flat fees

c) are really fucking unbelievably terrible