Giveaways with Origin Keys ???

Origin keys aren't allowed

Yeah, same for Ubisoft, but that doesnt matter which launcher you need to launch to play the game, it's all about Steam

Keys for any site other than Steam are not allowed, without any exceptions.

yes if you want to buy them a copy on steam after the winner doesn't (and does not have to) agree to the origin version (even if you say so) - if want rid try to trade it on steam trades or barter - but everyone is trying to so don't expect much in the way of deals

The idea is for the system to check that a game is activated on the account that won the game by checking their Steam library. It doesn't matter what launcher launches the game, as long as the game is in your Steam library, it counts. Any game that isn't launched through Steam is not allowed, but another launcher launching through Steam is fine. The winner would get a black dot on their record if they win a game that can't be publically added to their Steam library, and has every right to reject the giveaway as not received.

Edit: I personally don't mind participating in giveaways for any platform, including Origin, but coding verification for other platforms would be a huge undertaking and wouldn't be worth it anyway since most people prefer Steam, and most bundles are primarily Steam keys.

I get your point, but most of us are just waiting for origin store to die of like ubisoft's is.

Steam only here, but you could always make a clone site and call it OriginGifts.com

If you want to drop an origin/gog/ubisoft key, you could do it here https://www.steamgifts.com/discussion/tnWVh/anti-ninjas-key-drops-no-keys-in-messages-though or creating a new thread. It's not allowed on this site to create non-steam giveaways since you can't check whether the key has been redeemed or not