They can’t “push and pull” anything. With Sweeney owning 50%+1, Tencent and anyone else he sold shares to can literally do nothing - he will always have the final say. And since the company is private, there’s almost certainly an agreement/contract in place on those share purchases that if someone wants to dump them they have to offer them back to him/the company first. Since it’s not a public company they can’t just go sell their shares on an open market. The threat of a large shareholder is gone in a case like this - they can’t stage a hostile takeover and they can’t dump and run.