It can be yes.
It depends on G2A, not me. I've uploaded the keys, they providing it for the buyers, also they are collecting the money.
Yeah they say its because of security reasons. As long as i can activate it its okay but i might have to use a program to let steam think that i am not in germany right now. Its so stupid cause you only have this crap in germany (because steam doesnt have age verification). So even if ur an adult you cant buy it.