Consent-based personal data processing must be optional. That's pretty explicit in the GDPR. You cannot predicate service on a user opting-in (consenting). That

Consent-based personal data processing must be optional. That's pretty explicit in the GDPR. You cannot predicate service on a user opting-in (consenting). That's not consent. That's coercion, and the GDPR pretty explicitly bans it. "But how can we monetise our service if we can't get paid via exploitation of personal data of our users?" Don't know, don't care, not my problem. The ad industry has proven itself incapable of self-regulation, so the GDPR explicitly destroys this entire business model. Figuring out a new that works is the industry's problem.