1/3 of all Internet users hit Amazon-based services at least once a day
blog.deepfield.net
blog.deepfield.net
It is just far too easy to use AWS directly, or something like Heroku to get online services up and running on short time frames with little need to understand server interactions on the back end. This is a huge boon when an intelligently designed web application can just "turn a knob" and scale to millions of users.