I once onboarded as a vendor for a large, inflexible client and had to choose between two possible payment terms.
something like: EITHER Net 90 OR a schedule of discounts for any payment earlier than that (e.g 1.5% for 30 days and 3% for 15 days). and I wondered how many of their vendors simply jacked up their rates or fees to compensate, thus saving the inflexible client nothing. I guess this is very common.