I keep refusing his friendship. Baitenov.Tamerlan, I can't accept you. You're too pushy, that's my only reason.
I initially refused you due to having too much friends in friend list. After this, I'm scrounging my friends list (I sometimes accepted weird requests, not anymore)

Check this thread:
https://www.gog.com/forum/general/how_can_i_stop_somebody_to_spam_me_with_friend_requests

and others have same issue with that guy... of course he may be bot. stupid me.

How bots work?

Same issue here - just wish he'd, or it, would go away

nope

maybe its down to how, like, active you are here then?

yes declind them twice now. Don't who it is & there profile is private.

This thread needs a good TinyE comment.

Come out come out w.h.e.r.e.v.e.r. you are.

Out, damned s.p.o.t.s. Out, says StarChan!

So I'm not the only one. I refused that account 3 times because zero forum post (I usually check if a stranger ask for a friend request what post on this forum if I don't know him/her in person).
So it's a bot.... gog should really give the ability to perma refuse friend request.

I got the invite too since a few days now but i didn't accept it and i didn't refuse it, it still waiting and i never got other invit from him.

That's actually the trick.

See, unlike the PM system itstelf, it can only send and hold one request. Just click the clear notification button once and just leave it for a long time. (Unless GOG has a timer on it, but it doesn't seem they've added that, thankfully...)

Otherwise you're setting yourself to be hooked in a loop, a la; https://www.youtube.com/watch?v=6xCd55oSgO4

EDIT: I find it somewhat amusing that the nick name is Baitenov.Tamerlan, as in BAITE NOW! :P