I feel like large enterprises primarily see AWS as a way to outsource capital expenses.
However, once you’re in AWS its OpEx, who cares as long as you don’t break the budget too soon before EOFY.
0: https://cloudalarm.in/ – btw, you may wish to have daily budgeted pace based alerts using it – to inform you when the usage spikes up (much faster than Azure's consumption threshold based alerts).