You definitely did not signed up on June 24th 2 PM (CET). The tweet was posted May 22nd 06:02 PM CEST and even people that signed up 1 hour later did not get their invite so far.
And every minute counts. I can't do anything with round ups.
Edit: changed to 06:02 PM CEST
You are absolutely right. I didn't expect to have signed up so early. Totally forgot about it.
These are the correct times:
Signup: May 22nd 6:56 PM CET
Invite: July 5th 3:44 PM CET
There you see that they dont do first come first serve. I got my registration confirmation on May 22nd at 06:45 CET and got no invite at all.
But here's a question: Do I need to have a gog account at signup? Because I didn't. I created it afterwards with the given email address. But in my opinion this shouldn't matter because they only activate the email address and the account is only needed to USE the gog galaxy 2.0 beta, isn't it. Can maybe one of the already invited tester tell me if he or she already had an account on signup (if they even read this)?