Finally, you are welcome to propose and implement a completely new system. I will happily sit and watch this, but I will not help, because I am fed up with this whole story. In the meantime, I would rather make sure that Commons (and not other wiki-projects) lose as many contributors as possible. You deserved this.

Well, I think a lot of people (sysops) on Commons felt a little steam rollered. :-)
The request to keep unfree and potentially unfree images on Commons is a request we hear all the time and regularly deny. Keeping (c) media is not what Commons is for. If its a copyright violation, we delete the file. Period. So much for the general culture on Commons, which is a good culture that ensures freely usable media for anyone to use for any purpose.
IMHO the problem was the scale of the problem, which grew and grew as time passed. We tried to save some images, I even got an uploader flag on ruwiki by Atsirlin. Another problem was, as far as I remember, that some people felt that people from RU-wiki and the RU-WLM-participants don't give a dime about copyright and the rules on Commons. There was a certain amount of bad blood and lack of trust in each other on both sides. I guess that's what you get sometimes when creating a big international family.

One in 200 doesn't seem much. The problem is that Fae is uploading tons of stuff. Current count 3 mill. edits. See Fae SUL. I just found 5, no idea how many are still hidden somewhere. This needs to be fixed now.