Its amusing how people blindly believe in "its all banks fault for not having lolis!" crap. There are many payment processors who work in both US and EU and are fine with lolicon and extreme hentai content. For example, MangaGamer recently released porn game "Sweet Sweat in Summer", which has only one heroine, and that heroine is much more loli than Mischa/Nenya, and porn content there is much more detailed, with uncensored genitalia, sperm, and so on.

So here's very simple solution which not requires any content editing at all: Nutaku drops retarded ProBiller and goes with more porn-friendly processor.