You'd be able to opt out of data collection and request a copy of your data, but not opt out of adverts in general.

GDPR doesnt block ads

Not really. GDPR deals with privacy and personal data handling.

There are directives about transparency in the costs or charges tied to a sale, but it is not immediate that it covers including new ads as an extra burden on the consumer.

Same for other directives regarding misleading advertising and the like, hard to prove that this new anti feature goes against the advertised product. it’s all very indirect and hazy, we’re in need of more protections for consumer to truly own their hardware.