[giantrobot]

Adult content has a stupidly high chargeback rate. Chargebacks are expensive and card processors don't like adult content for that reason.

[satvikpendem]

Well if it's a direct bank to bank transfer, there's no chargeback, problem solved. Of course, you assume a lot more risk for getting back that 3% transaction fee, but if you know what you're buying, at least you can make the purchase you want to.