predatory, mafia or middle-age money lender style.
Your words have lots of sentiments, but present no facts. I know that Wolfire and Sweeney are independently throwing a tantrum, and we all hate taxes, but I don't see public exposés showing game developers who went hungry because they couldn't afford the 70-30 split.
I'll also remind you that the EGS (12%) is barely profitable, and operated for years at a loss, only sustained by Fortnite (which used dark patterns to extract money from kids, in case you want to see something actually predatory).
The owner of an account can set individual posts or their entire account to be visible only to signed-in sessions. I see it used by certain artists that moved from twitter, and consider it an overall good feature.