Did he really have all these alts?
I know for a fact that there was this guy who was caught by me had like 20+ high ranked accounts (I failed to get evidences for a few of his alts), all enrolled in highly paid signature campaigns, content creation competitions. He had all the times in the world laying in his hostel bed to create topics like how market will do in this and that situation, which one is the best alts to hodl, exploiting the bad situation in various European countries during COVID specially Italy and he was making like ten grands per months. Narcissists like that do exist among us just because of their mental illness.
It is not always obvious and accurate proofs that lead an investigator to find connection between cheating alts. Most of the times to catch a single guy who is very clever one, you need assumptions to make you interest about the person which then leads you to dig deeper. In your case you might not be wrong. From judging by all the mentioned accounts posts and hours of reading their contents, I have a very good guess that here we have a guy with all those alts might have histrionic personality disorder! Just for the sake of simple example;

There was literally no need for that personal text!
