FB is a proficient patent filer and here is just one of several hundred they've been issues in 2017: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2

FB is a proficient patent filer and here is just one of several hundred they've been issues in 2017: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=3&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=125&f=G&l=50&co1=OR&d=PTXT&s1=facebook.AANM.&s2=facebook.ASNM.&OS=AANM/facebook+OR+AN/facebook&RS=AANM/facebook+OR+AN/facebook http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=H... It covers how FB uses "influencer" activity to determine what a "viewer" would see. There's nothing new here that I see, but for all the people talking about and trying to understand FB I don't see anyone reading their patents. It's a lot of work and takes some practice parsing things out, but there is value there in understanding the general direction FB is going or where they are spending their r&d dollars. Side note: all the people asking why a good FB alternative hasn't arisen should take a look at these patents to realize how much of what we take for granted that FB does is prohibited for a competitor. FB is defining and locking out competitors from what the worlds thinks a social network is.