After looking up the games on steamdb and looking at the packages, all these games have RU+CIS and Asia restricted regions. I’d guess it’s one of those regions that can activate these games. A few of them also had Latin America but not all of them. Which is why I’m thinking they are Ru+CIS/Asia game keys. Could be completely off on that though, will be interesting to see if someone from those regions could try and redeem them.