Eg. Famous actor advocating for some luxury belief
I would wager that a blue check on Twitter is more valuable and monetizable than most 4 yr degrees.
It doesn't mean anything more or anything less than that these people are verified to be who they claim they are. But the person above is trying to indicate it means some kind of "endorsement" by some vague "establishment" that he dislikes.
Side note: anonymity can often improve the quality of online discussion. See: “breaking the social media prism”