Basically the utilization of the exchange stake allowed the initial overthrow of the top 20 witnesses, who were running fork 22.2 which froze Steemit Inc. funds temporarily. Justin’s witnesses immediately ran a new fork, 22.5 which unfroze the Steemit Inc. stake and began voting witnesses with it. So now, even with the two biggest exchanges, Binance and Huobi having revoked their votes, Justin still has enough power to hold a large number of witnesses and looks to be trying to recapture them all. In the meantime, you can also see most witnesses have reverted to version 22.1, which is the “normal” code prior to the freeze, with some still running 22.4 which also is a version with no freeze on his stake. At this point I don’t think any top witnesses are running the 22.2 “freeze” fork as a sign of overall good faith. Of course, they could revert at any time, but I can only imagine Justin has his own concerning alterations planned or else he wouldn’t be fighting for full control again.