This is the crux of the problems with how companies are interpreting the GDPR. Every service I've seen with a privacy policy pop up within the last 24 hours has basically justified all of their current data collecting practices as being necessary for their business. The spirit of the GDPR is to improve privacy, not just make Terms of Service pages longer.
Yeah, but the law of unintended consequences is sure to apply. The GDPR hits adtech companies fundamentally.
Hopefully...