[Discussing Instagram prior to Facebook acquisition.] "Mark: Hmm. Engagement metrics? Engineer: 23 mins daily per user. Teens. 94% return weekly. But here's t

[Discussing Instagram prior to Facebook acquisition.] "Mark: Hmm. Engagement metrics? Engineer: 23 mins daily per user. Teens. 94% return weekly. But here's the kicker: Their EXIF scraper tags locations silently. Imagine layering that with FB's graph. Hyper-local ads without asking. Mark: Go on. Engineer: They're a Trojan horse."