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That is based on huge assumptions, and it is unclear how the internal billing works (i.e is the Ad business consuming AWS services "free" or is there internal chargebacks happening). Is the AWS Revenue just from external customers using the services.

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> is the Ad business consuming AWS services "free" or is there internal chargebacks happening

AWS bills Amazon an internal rate. It’s a closely held secret that few employees know but supposedly it’s better than at-cost.

It is not secret. There is an internal spreadsheet that documents all the prices.

Everyone has access! Everyone I worked with at Amazon knew the prices they were spending for the different services they were using or thinking of using.

How could that work? Don't managers have budgets? Do they get drugged and blindfolded while their departments' AWS costs are deducted every month?

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