I don't mean to sling mud on other games
I did raise these games in my tickets
You did do so.
I'm paranoid about doing that when phones and PCs aren't exactly hurting for space
Do not waste people's space to have uncompressed ai images. Especially not with that paranoia reason. You are a developer, you should have the skills to learn about how this works instead of being afraid of it . There is no information worth keeping in such images. It is not pixel art. They were generated by an algorithm. They will compress very good without visible quality loss. Even if you see some pixels change, that's the dithering the ai put in there to have it look a certain shade. The compression will keep the shade, but the individual pixels are not important.
https://itch.io/t/2885012/tips-for-reducing-the-size-of-your-build
If you do not want to advertise the issues your game has, you can remove this thread. Discussing specific adult games in public community message board is not exactly the scope of this board. It is accessed by minors.