Audit of top 100 Outbid sites: only 11 retained UTM attribution data
HaktanSuren · x · 2026-08-23
UTMGrabber audited the top 100 sites buying spots on the viral Outbid.lol (nearly $100k in two days; $132k revenue reported) and found attribution largely broken:
- HTTP scan: 97 destinations preserved a tagged URL somewhere in the flow;
- Browser test: only 31/100 stored a UTM-bearing value after landing;
- After a follow-up navigation, only 11/100 retained the exact same UTM key/value.
Retention still doesn't prove ROI — GA4 logs sessions but CRM lacks source data, UTMs vanish on the next navigation, and conversions happen after the source is overwritten. Buyers are spending money while guessing what drove revenue.
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