I too think that the language barrier may have misled us a bit. I didn't mean to insult anyone nor accuse anyone to be a liar; I just stated that I've stumbled on this game too late and didn't understand at all that since the beginning the R18 version was reserved to early supporters. I didn't know and I couldn't know. I downloaded and played the NSFW demo from the November campaign page and I thought that sooner or later it would be released officially. When I read that the official version was out, I rushed to buy it and was disappointed to see it was just a PEGI-12 version. I just didn't have enough information to understand the peculiar (or should we say unusual) business scheme you were pursuing.
I've been for years a "modder" (content creator) for a popular game and I always gave my creations to anyone for free; but I kept a couple creations reserved to those players who made spontaneous donations. So, I can totally understand how important is to keep something reserved to supporters! But in my case I made it clear, writing it in capital letters as often as I could that those "special" creations would've never been released to the public, so people didn't have any expectations about them.
Anyway, case closed. The PEGI-12 version is funny and interesting; but while I played the NSFW demo many times to unlock all the GC, I played the PEG-12 version only once. I now understand I'll never get the R18 version and I can live with that.