Reading the Twitter replies, it sounds like they tried to negotiate with the payment processors, who responded by digging in their heels on their editing demands. The edits made to the nuns now make more sense. They're literally the same kind of edits that were imposed on game companies during the 8-bit and 16-bit eras. Sucks that there are still people who are stuck in the mud like that.

Antagonizing customers isn't good business, but neither is antagonizing business partners. Nutaku's still got an all-ages site to launch sometime soon, and mainstream customers aren't very likely to put up with not being able to use the payment processors available right now. Money talks, bullshit walks. Unfortunately, the deeper pockets of the anime and manga audience at large mean that they have a much larger voice than we eroge players ever will.