Ya, kremlin troll bots/both the same/etc bots get a tag (the obnoxious/hard core ones gets a block), then misogynists etc gets a tag and nice people gets a tag too.
Little nice? "+", super nice "+++". Little nice several times? "++"
What's the benefit for that? Can you fork it and run a copy in windows (or is it too integrated in wondows) or is it just Microsoft wanting your free labour (bugfixes etc)?
So you have no hard proof (no critic here, I'm just curious)? Not that it's better but that your test images has the same quality.
For the rest, thank you for the links and the time but that only explains how the compression works.
If you want to know you could do fourier transform and see which kind of signals are cut out in one for example.