Apart from $/€ being down, could this also have something to do with the GDPR starting to get enforced, biting into Facebook's ability to make targeted advertis

Apart from $/€ being down, could this also have something to do with the GDPR starting to get enforced, biting into Facebook's ability to make targeted advertisements? In the past 6 months or so I've noticed cookie permission popups mostly no longer have all their tracking options enabled by default.