Google's attitude towards services seems much different from Amazon's as well. Google seems to focus almost entirely on ad-supported (with a few for-pay services, like Apps for Domains); Amazon, on the other hand, charges for all of its services (with a few ad-supported things, like cheaper Kindles).

The Google approach would discount something like EC2 or S3 showing up; if your first question about any product is 'how can we use it to serve advertising?' then services like that won't make the cut. If your question is 'Will people pay for it?' then they definitely seem appealing.