I would argue it's a much easier blank check to write than for consultants. Software complexity over time is a major headache and new initiatives happen all the time.

Take for instance GDPR - in AWS it was a company wide effort to get all the services GDPR compliant and that was basically a non-existent pricing change to consumers.

Also the fact that I can call up AWS support and have them look into a bug immediately with real devs on the other end is invaluable when my business needs rely on a certain feature working.