Reeeeee has the most users plain and simple.
And where's there's people, companies and employee sucks ups follow.
The point is if gaming employees join the board and interact with users, the company looks good and hopefully more people buy their games. And the people willing to be verified are usually employees skewing to the higher ranks, since every company doesn't want a free for all of every employees chiming in because its risks saying something dumb.
My company (non-gaming) is the same. They tell all employees to not get on social media and represent the company. Instead let the marketing department handle it all. Even if you mean well, if you say something stupid, it might ruin something. They don't want a junior analyst trying to save the company by being the mouthpiece. So if someone chimes in, it'll be a high ranking marketing person or product manager who will respond.
The funny thing is virtually all posts by industry people regarding games they aren't going to tell you secret info anyway, so what's usually left are vague responses about games and safe political views that conform to the board. And since Reeee is a left wing board, they don't want to ruffle feathers, so any of them willing to give political views will skew left too.
Now if that was a rifle association board, and some gun maker employees were verified as users, I bet any money every one of them would conform to right wing views saying guns are good. And for those employees that are left wing and don't like guns or Trump, they'd all keep their mouths shut.