That's actually why I'm concerned. Information in this guide is not wrong, steam packages have region restrictions, and steam keys give some steam package. But the catch is - there is something more to region restrictions than just steam packages. There were found some keys, that give package without restrictions, but the key still have region lock. So, steam has at least two different kinds of region locks for keys - one that is explained in this guide, and one that is hidden and can't be analyzed (or I don't know how for now). So, it's entirely possible that there is no restricted package, but there are restricted keys. And this makes my guide dangerous and misleading, someone may follow it, find out that there is no restricted packages and set a giveaway without restrictions, and then encounter troubles when winner can't activate key because of region lock.