"EU data protection authorities find that the consent popups that plagued Europeans for years are illegal. All data collected through them must be deleted. This decision impact Google's, Amazon's and Microsoft's online advertising businesses."
https://www.iccl.ie/news/gdpr-enforcer-rules-that-iab-europes-consent-popups-are-unlawful/
@guardianproject Appears to apply to *tracking consent* gathered with popups, rather than any and all use of popups.