As far as I know, neither Google, Amazon or Azure have a budget limit, only alerts.
This is a reason why I am not only clueless of anything related to cloud infrastructure unless it's stuff I am doing on the job, nor I am willing to build anything on these stacks.
And while I guess I have less than 10 products build with these techs, I am appeal by the overall reliability of the services.
Oh lastly, for Azure, in different European regions you can't instance resources, you need to go through your account representative who asks authorization from the US. So much for now having to deal with infrastructure pain. It's just a joke.
I've used Azure with spending limits. They do work, they shut down things, and the lights go off. [1], Only some external resources you are unlikely to use don't follow spending limits, but when you create such resources, they are clearly marked as external.
That's one positive side of Azure.
[1]: https://learn.microsoft.com/en-us/azure/cost-management-
These limits are only for subscriptions with a credit amount e.g. $200 trials, Visual Studio subscriptions etc. As soon as you are on a pay as you go, you only have access to budget limit.