https://www.cnet.com/news/apples-clash-with-facebook-and-google-what-you-need-to-know/

It proved to be more a show of power than long-term punishment. Apple, which did not respond to comment, restored both companies' certificates by Thursday. Google said its internal apps are back up and running. Facebook confirmed Apple restored its certificates but said it did not have any new information to share. 

The spat started after TechCrunch reported that Facebook had taken advantage of an Apple program that lets companies design apps for private corporate use, as well as test apps before they're available to you. Using a certificate from Apple's Developer Enterprise Program, Facebook distributed a market research app that gave the social network access to people's phone and web activity, paying them as much as $20 a month. The data Facebook could view included web searches, location data and even private messages.