Hm, edited out snark. I think that's an easy trap to fall into, and it's good to warn against.
What I agree on (top comment): there should be laws against providing cloud services without a fee cap. Another edit: businesses and hobbyists are different beasts of course. You can't demand scaling and reliability and a hard fee cap. For traditional shared hosting, this is mostly a solved problem AFAIK.
That's what prevented me from using Firebase for a hobby project in 2023.
The only available killswitch was some weird workaround with a Google Sheets monitoring the bill and triggering an action (give or take latency) when it exceeded some amount...
ehm, no thanks.