We hit this at MSN: we removed the "print" button from all articles. Result? Engagement in Japan fell. Why? Apparently, printing out a sheaf of articles to peruse on the train is (or was) a thing. Solution? Re-enabled the "print" button in Japan; everyone else was saved from downloaded the unused-in-market "print" button, lowering PLT.

Please keep in mind I'm talking about stuff from about five years ago when you run to MSN.jp looking for print buttons.