I've been an App Engine user for 15 years. Last year I needed some help and I had to pay some small amount for support and get an engineer to actually look at my account and tell me how to do something.

I don't remember how much it was, not much. I subscribed to the support for one month, then canceled. I've paid them hundreds a month for years, so it feels kind of cheap of them, but I did manage to get the help I needed.