The Google Intrusive Interstitials Mobile Penalty Coming January 10, 2017
Search Engine Land, Google announced they are launching a new search algorithm penalty, to demote mobile pages that have "intrusive" interstitials that get in the users way.
Google said this new algorithm will launch on January 10, 2017 and will try to make these pages "not rank as highly" as they once did. This is actually replacing the app interstitials ad penalty that launched in September 2015. So that penalty is going away but it should cover and have the same impact on app interstitials ads.