[thenaturalist]

Well, if you read the parent comment here again, I hope you can understand that "how big of a 'client' Amazon is in AWS itself" is _precisely_ about estimating profits for AWS.

The fact that Amazon is self-serving AWS resources is obfuscating profit calculations or estimates as there is no way of determining ROI on assets Amazon consumes itself - most likely in a somewhat shared model together with other, actually paying customers.