Bots! Bots are so fast and pervasive that they're stealing the keys before they're even stocked!! Or so the Germans would have us believe. No, it's just that sometimes games come up listed as Out of Stock. It'll be fixed eventually.

You don't understand it, the sale isn't even available, how they can buy / exchange them?

THEY HAVEN'T BEEN CLAIMED! My guess is that the keys have not been provided yet so it says there aren't any left because there have never been any in the pool.

If you check the Steam store page for those games, you'll see that they have not been released yet. AWA don't have the keys yet.

because the vault hasnt opened

Admins and mods split keys between themselves already (I'm joking oc).

time traveller bots

Oh no, you missed the New Year's celebration! When the new Vault appeared, members were allowed to claim those games for free during the first hour. 😏

You have to cash-app Cartire $10 to get on the "early birds" list.... ;-)

Classic Alienware. Just get the ugly indie and you might get a good surprise