In the wake of TechCrunch’s investigation yesterday, Apple blocked Facebook’s Research VPN app before the social network could voluntarily shut it down. The Research app asked users for root network access to all data passing through their phone in exchange for $20 per month. Apple  tells TechCrunch that yesterday evening it revoked the Enterprise Certificate that allows Facebook  to distribute the Research app without going through the App Store.

https://techcrunch.com/2019/01/30/apple-bans-facebook-vpn/