Currently given away on fanatical.com (see discussion here: https://www.steamgifts.com/discussion/nB0F7/freesteam-12-is-better-than-6).

Seems that the giveaway is region restricted, but it's likely that the key itself is not region locked.

Key will expire on November 07, 2023 at 11:00 PM (UTC).

So I suggest you enter only if you can't get it on fanatical.com, and are willing to allow to delete the giveaway if you can't activate it for some reason.

Good luck!