Investigations

Two windows, worked in the open.

The method here is the live engine’s, step for step. The brand is northstargoods.com, our worked example — customer accounts are not marketing material, including our own. Where the evidence stops, the page says so.

1. northstargoods.com · 11–13 June 2026

   Three variants of one campaign. Google ranked them.

   The same promotion went to three audiences on one day. Google published a separate feedback-loop identifier for each, and the win-back segment complained at 2.6 times the rate of the main list.

   0.283% peakagainst 0.117% baselineRead it

2. northstargoods.com · 9 June 2026

   The send behind the spike was the smallest of the week.

   The spam rate doubled on a day the account sent 46% less mail than its baseline. If you are watching volume for a cause, this is the day you find nothing.

   0.230% peakagainst 0.115% baselineRead it