Earlier quoted context omitted.
If, as seems to be the case, Instagram is the popular destination to migrate to will Facebook be too bothered by a drop in Facebook numbers? Sure some will go elsewhere, and block enough FB tracking to disappear entirely. Instagram, of course, will allow Facebook to keep tracking and advertising to people just fine. No doubt they've already linked Instagram and FB identities wherever possible. So all that remains is…
Instagram, of course, will allow Facebook to keep tracking and advertising to people just fine There aren’t many “like/share this in Instagram” buttons around the web.
Instagram is just data provider.