This article doesn&#x27;t make anything clear - though it attempts to make the suggestion that the different social networks are communicating information about your activities across networks.  In reality it seems as tho many of these social networks are actually just using very similar inputs to their people suggestion algorithms (on Facebook to suggest people you might want to be friends with, on dating networks to suggest people you might want to date).  Since many of these  suggestions are made to you based on your phone number or device location, you are likely to see the same people suggested to you by these different networks even tho they are not sharing data about your activities.