Yes, it has been explained. If you had a patch that says "true" it still works, as it's set to "false" since it was on Patreon, he never changed it, since he got banned (again) on Patreon, there is no need to even have non-incest patch part anyway since he's only on Subscribstar. Let's also not forget about the paywall to that is included in the code.
Also, more likely (not my words) the patching system was lifted from another game.
That is why it's mentioned the dev's default "patch = true/false" doesn't work so well, and why I modified it to work with episode 1 and 2, replace images, script all that. My original patch had it all nice and neat. I'm currently updating it for episode 3, but if the dev word just removes the non-incest stuff, unless he's trying to cater to non-incest subs to, I guess would be a reason to have it, but should really just have a toggle instead of the patch, as the patch was for Patreon bullshit.