@tedster, with 500 annual quality updates, the rankings are always shuffling, so the zombie periods are now almost a daily event. I had two micro zombie periods today. My "everyday" sale at 7am +/- 30 min, then an ON period from 8 to 10, then off until 3pm, three consecutive conversions and now off ever since.
Patterns used to look "natural", now they look artificial and manipulated.
This is a logical progression when an "entity with a plan" is controlling the system.
Understanding the plan is easy...it's all about money.