Tracking pixels that ignore opt-outs.
How often each vendor kept firing after a visitor said no, across 313 US e-commerce brands we tested, why it happens, and how to fix it.
Meta
Still firing on 47% of the brands in our data. The Meta Pixel reports page views and purchases to Facebook and Instagram for ad targeting and measurement.
Google Ads
Still firing on 45% of the brands in our data. Google Ads conversion and remarketing tags report visits and purchases back to Google's ad platform.
TikTok
Still firing on 36% of the brands in our data. The TikTok Pixel reports page views and conversions to TikTok for ad targeting and measurement.
Klaviyo
Still firing on 28% of the brands in our data. Klaviyo's onsite script powers signup forms and tracks browsing for email and SMS marketing.
Still firing on 15% of the brands in our data. The Pinterest Tag reports visits and conversions to Pinterest for ad targeting and measurement.
Microsoft Ads
Still firing on 13% of the brands in our data. Microsoft's UET tag reports visits and conversions to Microsoft Advertising (Bing) for targeting and measurement.
Attentive
Still firing on 12% of the brands in our data. Attentive's tag powers SMS signup forms and tracks browsing for text message marketing.
Snap
Still firing on 9% of the brands in our data. The Snap Pixel reports visits and conversions to Snapchat for ad targeting and measurement.
Figures from the October 26, 2026 opt-out report.