Where are those giveaways coming from?

Personally, I'm just testing the site myself.
Saved myself a stack of gems (Their currency) to get myself a steam game (Still waiting for it to be delivered :/ )

If you're ok with "trash" games in your library, then it's worth checking out cause from what I know, they tend to do giveaways everyday

Hope this helps!

https://www.steamgifts.com/discussion/EhJvw/where-are-those-giveaways-coming-from/search?page=60#hmCI2jA

Not often OK games and the soulgems that you can collect bring with the boxes only bad/cheap trash games. Only with choosing money cards/wallet or not random games you get better stuff but you need months to get that ammount of soul gems.
At least without to play promoted games, as example War Thunder. I can't say much about that part because i never done that for them.

In the end i would advice only to grab the games that you want and that should be a very low ammount.

Oh and nice Game history at your steam profile. Sounds very similar to my own experiences

Again true, but if it's an official SG ref then why did you tell a random user to remove it if it's allowed & used? There was no need to moderate anything, by anyone.

I knew about referrals for partners (I linked SG's info about on SG ref links) but I haven't seen sliders to give them money - are they surely still around? I get no such option for the horror bundle despite entering through SG and having the automatic referrals up.