When on the Pro plan do you automatically get charged for more resources, or is they charges you can add on if you need more resources?
eg. Functions says "$2 per 1m" for additional exectuions. Will that be charged once I go over the base allowment, or if I run out of executions can I then decide to pay more for more executions if I want to?
TL;DR
Pro Plan users are not automatically charged for additional resources. They can set a budget cap to control any extra charges. If you exceed the base allowance, you can choose to pay for additional resources as needed, such as extra executions.