"Facebook uses an internal database to track rivals, including young startups performing unusually well, people familiar with the system say. The database stems from Facebook’s 2013 acquisition of a Tel Aviv-based startup, Onavo, which had built an app that secures users’ privacy by routing their traffic through private servers. The app gives #Facebook an unusually detailed look at what users collectively do on their phones, these people say."
https://www.wsj.com/articles/the-new-copycats-how-facebook-squashes-competition-from-startups-1502293444 #VPN #packetsniffing