My above-the-fold unit ladder (in order)

My above-the-fold unit ladder (in order)
Ok so people throw 4 units up top and wonder why RPM tanks. Do it in this order, one change per 48h:
— Start: one in-content unit after paragraph 2 only
— Add a 336x280 right rail (desktop) — check viewability stays 70%+
— Add an anchor unit (mobile only) — watch bounce, kill if +5%
— Only THEN test a header unit, last
Each step, wait 2 days, compare RPM not CTR. CTR lies, RPM pays.
Steal it.