This should (eventually, as the EU millstone grinds long if fine) be interesting:
Brave (browser) files Google GDPR complaint [brave.com]

Brave has filed a formal GDPR complaint against Google for infringing the GDPR “purpose limitation” principle. Enforcement would be tantamount to a functional separation of Google’s business. 

This morning, Brave filed a formal GDPR complaint against Google for infringing Article 5(1)b of the GDPR, which sets forth the “purpose limitation” principle.