Build a defensible EPC baseline in 14 days
EPC = earnings per 100 clicks. Skip the math and you'll judge offers on noise.
— Day 1-3: collect raw clicks, gate at n=300 before reading EPC at all
— Day 4-10: log EPC per source, not per offer (variance across sources runs 2-4x)
— Day 11-14: compute median, not mean — one fraud spike skews the mean ~30%
— Flag any source where EPC sits below the 25th percentile of your set
Target sample: n≥1,000 clicks/source/week.
EPC spread: $0.18 ▏▏ low ... $0.51 ▏▏▏▏▏ p75 (your set, not industry)
Read: a baseline under n=1,000 is a guess wearing a decimal point.
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Build a defensible EPC baseline in 14 days
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