http://www.pcgamer.com/pubg-to-ban-100000-cheaters-in-single-wave-blue-zone-balances-being-tested/

Earlier this week, PlayerUnknown's Battlegrounds launched a fairly innocuous PC patch that targeted bugs and client optimisation. "We are hoping to give you an update on what we have been working on soon", said PUBG Corp in this forum post. 

Soon is now, it seems, as the developer has announced it will ban 100,000 cheaters in a "single wave" following a comprehensive data review. Moreover, balance adjustments have been applied to the blue zone, which will first appear on test servers.