As a former vendor to a Fortune 500 Company, even said Company often paid me in excess of their own net 30 payment terms. I can relate to "Company Y" in the article, because my thought was if I complained my orders might shrink or not come at all, plus I could afford it. I did not stay quite entirely I would contact their accounts payable and try to move their hand, but it was clear they were capable of inventing issues to justify their failure to pay (much like I imagine insurance companies always have an excuse for denying a claim) so I found "complaining" actually worked against my goal.