I'm assuming that he did it for the money.
He put notifications behind a paywall.
He hijacked a successful platform that's hard to monetize, thinking that he could just migrate the user base to one that's easier to monetize.
He kicked off all of the alt media guys in favor of MSM and right wing institutional media, who can pay him for clicks. He got nothing from people commenting on bitchute videos.
Occam's Razor seems to apply.