Learnt recently DigitalOcean does not have hard budgets limits, only emails.
I am surprised and torn between this being intentional vs. them not caring.
One solution is banking apps that let you create extra cards and assigning hard limits to spending. Wise & Revolut apps can do that.
Have to mention OpenRouter also, I logged into OpenRouter through pi, on the auth screen it optionally let me set a limit which is very smart and user friendly.