I get the "Your daily budget has run out; you need to add to it" emails from Amazon from time to time. I've learned not to do that; it never results in additional sales that day.
This email had fancy graphics and wanted me to learn more about keeping my campaigns active throughout the day. Okay, that's nice.
I clicked the "Learn More" button and Amazon explained how it calculates how much of your budget to use and that it can go 10% over any day as long as the 30-day average is your daily budget amount. This is not news.
Then I looked at Amazon's recommendation for one of my ads, which was part of the email. It said I should triple the daily ad budget, based on the statistic that I am only using 9% of my daily budget currently.
Huh?
Last month, Amazon spent 100% of my ad budget for that title, not 9%. Within a couple of days, I'll find out how close to 100% Amazon did in May; I expect it to be the same. So why the 9% figure? No idea.
No idea, and I'm not jumping to spend more on the ad.