Why? Recently Valve suddenly changed their mind, after allowing pretty much all kind of porn-VN without problems in the past


Then, reading around there are various ways to "fix" this, however differently from the past you can't link directly to an uncensor patch or other system. I have very limited time and I prefer to invest that time in doing games, rather to do those workaround, which all have various problems, extra support requests, etc. I have no time for such things.
So from now on, I'll treat Steam like the mobile appstores, where you can't have any kind of adult content in it. Sorry but wasn't my decision. The only place where I can decide (at least for now - watch out for the INQUISITORS!! ROFL) is my own site/itch.io.