There are, of course, both very capable and professional people, and also kind people who are keen to react / learn, but we've also had situations where 429s result in complaints to their management how our API "doesn't work", "is unreliable" and then demanding refunds / threatening legal action etc...
One example was sending 1.3M update requests a day to manage state of ~60 entities, that have a total of 3 possible relevant state transitions - a humble expectation would be several requests/day to update batches of entities.