Ubisoft games giveaway in Steamgift ?

most of them are unbundled, so its only going to be the more generous folks giving them... and those will tend to go to groups where there are less bots/hyper leeches.

Just finished a giveaway for AC Odyssey.

I won AC Odyssey from here quite a bit ago. You can giveaway whatever games you like, so long as they exist on Steam and it's in the form of a steam key/gift. There is no rule to disallow a game on steam to be given away here because of ubisoft connect, and I've never heard of the counter strike thing.

A quick look into the archives and we can see:

https://www.steamgifts.com/archive/search?page=64&q=assassin%27s+creed -> ~1.6k giveaways 
https://www.steamgifts.com/archive/search?page=86&q=far+cry -> ~2.1k giveaways
https://www.steamgifts.com/archive/search?page=17&q=rainbow+six -> ~400 giveaways
https://www.steamgifts.com/archive/search?page=21&q=Watch_Dogs -> ~500 giveaways

I didn't check for Anno, Rayman, prince of persia etc, but it should be about the same I guess.
You can check by yourself here: https://www.steamgifts.com/archive

I did. But the region restriction on Steam is very tight so you can't see it much, unless givers are from US, Canada, Europe, only them can give worldwide.

I tried to buy a US account before, with the purpose of giveaway games worldwide, but the gift policy was very strict. Steam prevents people from gifting games more than buying games for themselves. Yes, their choice, I save my money.

https://www.steamgifts.com/archive/search?q=far%20cry
https://www.steamgifts.com/archive/search?q=assassin%27s%20creed
https://www.steamgifts.com/archive/search?q=watch%20dogs
https://www.steamgifts.com/archive/search?q=rainbow%20six