They did mention that is why they are not working on it anymore at this time, Steam denied the game due to an unspecified reason. They are not willing to work on it without making "enough" (they said they are not making enough to continue development as of now) money while doing so. So if they could figure out a way to make it available on steam and keep the nsfw part, why not?
What can they do? And how do we get to keep getting updates to this game? That was my only idea I had, this game doesn't deserve to just get cancelled or put into indefinite limbo. And it would be a good idea to they actually post the recent update in the actual dev updates instead of it getting buried in the comment section, just incase that was the confusion.
*wanted to add:
I am going based on speculation of what other people have said, so if they are not willing to make a few changes or do a work around, then this is pretty much the end. They are not making enough to work on it as is through this page and their patreon page.