Earlier, Facebook relied on the "Research" application to pay users in exchange for their personal use data, which caused much controversy. Recently, Apple, which is particularly concerned about privacy, put pressure on Facebook. Later, the FB took out the Enterprise Developer Program (allowing internal download of test applications that could not be found in the App Store) as a shield, but the iOS version of the survey did not escape the fate to close. However, the development of the plot was not meant to produce variables. Earlier, Apple confirmed to Recode that it overturned the Facebook development company certificate because it violated the Developer Developer Agreement and distributed apps to non-FB employees outside the official store.
Once the certificate was revoked, Facebook was actually much more affected by the many expected. The key point is that they have many internal tools that can not be used at once. Faith has taught its informants that the development versions of basic Facebook applications, such as Messenger and Instagram, are not working now. Even iOS applications such as a la carte and trips used in FB have become unusable.
In fact, while at the same time as an iOS version of the survey, Facebook claims that its own software has clearly expressed its intention when it is attractive and that participants claiming to be "less than 5%" are teenagers and have received permission from their parents. But in case they use Enterprise Development Certificates to disseminate Research beyond Facebook, they have never had a reason to stand up. In any case, Apple and Facebook are nervous about privacy. It can be difficult to improve in the short term.