Data protection rules are changing in europe from May. Part of these changes means that companies can only collect data for a specific purpose, for a specific duration and the person providing the information has to actively opt in to providing it, a record kept of them giving permission, and clear method of them being able to opt out
More details can be found here
https://ico.org.uk/for-organisations...gulation-gdpr/
Basically, facebook weren't happy that the information collected by CA was not being subsequently re-used for other purposes