"Kill at 3x your CPA" is lazy

"Kill at 3x your CPA" is lazy
Everyone parrots it. 11pm, a creative sat at 2.4x my target CPA and I almost axed it.
Then I checked spend → only $18 deep. Zero conversions on $18 means nothing. A 3x rule on thin spend kills winners before they breathe.
— Kill rule = the loss threshold where you pause a creative.
Tie the threshold to spend, not a fixed multiple: no conv at 1.5x your target CPA spend → cut. Below that, you're killing noise.
Go recount your last 5 "losers."