The cost of support has to come from somewhere -- is either Amazon or Google generally cheaper for cloud computing? (I know ~nothing in this area). I could definitely imagine a market for both a cheaper service that's lacking support and a more expensive one that offers increased support.
With that said, with Amazon's efficiency in logistics, I could definitely imagine them implementing support at a negligible cost.
You're right that please and thank you could come off as sarcastic or a bit odd in a comment section like this.
The best route is probably to clarify that it seems like a good concept, and you think that adding x and y would be the best features to focus on that would make it even better.
With that said, with Amazon's efficiency in logistics, I could definitely imagine them implementing support at a negligible cost.