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 does

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