There is also the fact that if a company has critical systems go down because GCP hit some hard budget limit, it will be reported in the press as "Netflix down

There is also the fact that if a company has critical systems go down because GCP hit some hard budget limit, it will be reported in the press as "Netflix down globally due to issue with Google Cloud". Google doesn't want the bad press. Most real companies would prefer to have a big bill when their product surges in popularity than have unexpected downtime at the worst time.