> you can negotiate with the billing department at comparative leisure.

I'm curious. How likely is the billing department to waive off a huge bill as bad debt because an inexperienced builder misconfigured their infra or was hacked?

Not the OP but run a high margin service that has customers run up accidental bills often. Customers running up bills intentionally and then not paying is even more common. There is almost no situation where trying to force a customer to pay makes sense, we write off any amount without question. The goodwill is worth it every time. Most SaaS companies don’t even have the processes in place for debt collection anyway.