http://www.google.com/enterprise/cloud/appengine/pricing.html
https://developers.google.com/appengine/kb/billing
> This min charge is dumb, and I got snagged on this too. Why can't you just be billed only if you go over?
Because Google is losing money on you already. I don’t have insight in to the exact numbers, but much like banks with Checking and Savings Accounts. Banks lose money on accounts with less than $20k a year in transactions.
Google loses money on accounts with less than $X a year in usage. I’m guessing that number is something like $800 a year.
The Free quota is a marketing loss leader, and away for you to do test development. If you can’t afford $2.10 a week you are doing your app wrong.
Works out that on my primary sites my Appengine Costs are $0.032 CPM Even if you totally suck at monetization you should be able to make this back. ($6.70 eCPM is the current English Site Average CPM according to Ad Age)
-Brandon