Invalidated is probably the wrong word.
I'm imagine the scenario where Justin would acquire STINC stake and use it however he pleases. Which is fair because it'd be his stake then. But, may not be as great when he could control consensus through witnesses. I suppose that could go either way.
Of course, there's also the whole "scare" of Chinese government coming in from the shadows and stuff.
From a more practical point of view, I guess I don't really care if it means my stake is worth more than it is currently.
There is one thing I'm a bit puzzled...why delist STEEM from Poloniex if he were to acquire STINC or Steemit.com?