But can't DS just have a Patreon page without info about BB, while still post BB on another site? a blog or something. I've seen this idea in other threads, other NSFW developers on Patreon do this.
You just pledge to the author, and then in his own webpage he gives you the download links. the majority of patreons know what he's working on so I don't see why people would cancel their pledges. This way the Patreon only promotes the author, not the game.
Maybe there is a reason why they cannot do as I say, in which case fml