[chen_dev]

Limits Reached -> PubSub Notification -> Shutdown Sequence.

Because it's a free plan, the delay between 'limits reached' and actual shutdown only incurs the cost of providing the service during that brief period, not the potential liability of overcharging that might exist on a paid plan.

[ffsm8]

Is that really a problem though? Just don't bill beyond the cap then and leave the last few requests free, too.

Or write a disclaimer that the billing cap doesn't necessarily cut off at exactly that amount and that there might be an overcharge.

I am pretty sure most people would be okay with either of these options, we didn't need a perfect system, just one that works well enough