The move in general is to shift from a fixed impression number when you hit a page, to a constantly increasing impression number as you scroll, with other chang

The move in general is to shift from a fixed impression number when you hit a page, to a constantly increasing impression number as you scroll, with other changes made to increase scroll depth (and thus more impressions). I'm just waiting for them to add auto-play muted videos to the feed so they can charge those higher video CPMs.