I ran a small video production business. We were doing animated 30-second spots. They were complicated scenes, too; full scenes with people talking to each other, etc..
We were only charging the client around $800 per spot, an already extremely low amount for the amount of work. We asked to be paid within 30 days but the agency always paid 60-90 days later, ignoring any late fees.
One day the owner of the agency called me:
Client: What kind of deal would you give me if you wrote me a check for a few spots in advance?
Me: If you paid in full, I’d give you a 10% discount.
Client: I was thinking more like getting the third commercial for free if I paid for two.
So he wanted me to do a massive amount of work for free if he paid us within our normal business terms. Yeah.. what a deal.