If you're a B2B SaaS, and a client either says cashflow issues or is transparently hitting all their vendors and asking to trade in their good customer brownie points for money, there is a really simple calculation in good times or bad.
b) If I don't, very high likelihood that they pay what they owe and churn immediately.
"No worries, we're a small business too and know times can sometimes be tough. I've told the accountant to write off the X invoice in consideration of you being a good client. Best of luck and skill."
I don't actually have to get the accountant's approval for business decisions, and technically the interaction was "I pushed a button and it does what the accountant would expect it to do without paying him $600 an hour to examine a communication."
Mostly they don't; they slow roll invoices and a SaaS company leisurely attempts to convert invoices to money.
If they outright refuse to pay, cool, businesses gonna business. Really clear no regret decision at that point.
They seemed... surprised to hear "No."