It's quite funny that I'd have to pay $150/month for the privilege of email support related to "service errors".
It's completely fair to expect customers to solve their own problems, but when the problem is on Google's end, it's beyond outrageous to charge a premium to resolve those.
I agree that it's funny, and would probably be a turn-off to most people. Consequently, I doubt Google cares if many people sign up for that. Back in the early days of GAE, I remember success stories told by some companies. Anyone established businesses building apps that will bring in serious business revenue might just jump to the Platinum Support. I know this means a lot of indie developers might not be excited about this, but perhaps Google just doesn't care since they might be making money off of the big customers...?
It's completely fair to expect customers to solve their own problems, but when the problem is on Google's end, it's beyond outrageous to charge a premium to resolve those.