toxicTom: Although I think this could be a really good idea, GOG just doesn't have the manpower to stem this.
Well, I do understand GOG is a lot smaller. But, now coming from someone who uses mods for Skyrim...
There is A LOT of skyrim mod sites out there that don't take barely any manpower at all. Heck, Nexus had a very small team early on and over time it grew.
With that said, what the other poster said is true...people put up old patches/mods or use current mods and put them up as theres for "donations". Though, this can happen even on the Nexus (and it has, I had an ENB stolen and its still up and Nexus took the guys side). But heh...
I think just having a modding area would be nice enough if there is donations or no donations at all. Obviously, going through the forums you can find mods...but its kind of nice when its in its own section and easy to find.
But like in Witcher 3. If they allow the game to be moddable, it be great to have a section on the site for Witcher 3 mods without going to some other place for them.
I think the idea is good, and if they start smaller it wouldn't take too much work (then again I never ran a mod site, just from what I've seen of at least skyrim and older elder scrolls...starting small works out from what I've personally seen). And GOG having an actual section to support mods would be nice, and honestly, there doesn't even really need donations at all if that is an issue.