CNAME cloaking crackdowns are breaking measurement

CNAME cloaking crackdowns are breaking measurement
Heard: browser and DNS-level moves against CNAME-cloaked third-party trackers are quietly breaking the verification and viewability pixels some vendors rely on — so buyers see 'unmeasurable' on your inventory and pull spend, even though the impression rendered fine.
— Ask your verification vendor if they use CNAME-based collection
— Push for first-party or server-side measurement before the break
Impact: unmeasured inventory gets defunded regardless of quality. Confidence: rumor.