They may have agonized about removing Milo’s check but they’ve been handing them out willy nilly for a few years now. There are tons of business people and friends of Twitter employees with the blue check. People who would not be known outside of their social circle yet they get “verified” as if they were under any risk of impersonation whatsoever.
My personal observation is that these random blue check people skew very heavy to the left of the political spectrum, but I have no data to back that up. Certainly the people I’ve seen are much less notable than Milo though.