Basically, they believe they can become rich at a moment's notice, and therefore, any support for social welfare programs is seen as directly detrimental to their interests—even though it’s not, and they would actually benefit greatly.

Imagine convincing 290 million people that they’re not "poor" but simply "potential millionaires" or "rich on hold."

And consequentially also no "free" endorsements and manipulations on (social) media.

You bet. People are having problems deactivating their accounts. Don't believe for a second that the Twitter api's can't handle a tiny bit of traffic that generates. They turned it off.

I bet X turned the deactivation option off, hoping people will forget their decision and stay.