..Then it dawned on me. Gabe isn't making an adult game, she's making a (for most intents and purposes) indie game with adult themes. They may sound the same but they are different in the most important sense...
In some cases there might be a bit of a distinction, but I don't think Gabe is first and foremost creating an indie game. All the marketing has been "adult game", including the fact that it was initially funded by a campaign on a crowd-funding site explicitly for porn. The core gameplay is still just stock RPG Maker with some clumsily implemented mini-games written in the native Ruby scripting from the engine (or whatever this version used). Its biggest feature has always been a porn gallery with some complicated hoops to unlock it.
The stream-friendly option was a later addition that wasn't even present until 4-5 years into development. If memory serves, the first and/or second game had a stream-friendly option that was added because a couple of contributors wanted to play the game on Twitch without getting banned. I think it's to support relatively free advertising, not part of the vision. Although, it's difficult to imagine a few random streams generate much support.