Soldato
There's definitely a change in his demeanor but I guess he tweeted less back then so the crazy wasn't as obvious.
They do say that power corrupts.
It must be difficult not to let it go to your head when so many people on Twitter almost worship him like a god. You'd think he would have some friends who'd slap him back to reality but from reading about his time with x.com/paypal he refused to listen to anyone and always thought he was right.