Companies this size almost certainly have different terms of use. I worked for a smaller, but still ASX200 company that had a custom contract, and assigned staff that would drop by 2-3 days a month. Of specific note was that if AWS wanted to stop doing business with us they had to give at least X notice (from memory that was 12 months for us).
For our risk profile this was more than enough time to migrate off any AWS' proprietary technology.
For our risk profile this was more than enough time to migrate off any AWS' proprietary technology.
That makes it worth less to avoid exposure.