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I don't know about any of that but I know they've definitely need your phone number and then auto collates your contact list without your permission .
Apps like this make it easy for people to make relationship maps of cohorts you are in habitual proximity of or keep in contact to most.
Most Advertiser Analyticals already classify cohorts based off of internet searches and site visitations, im sure memes and keywords are also beinging delineated to better paint a portrait of you.
