Re: Setup cartridges......
It's the business model invented King Gillette. Sell razors at or near giveaway prices and then make your money selling the blades to go with.
A few years ago HP threw a hissy fit because people weren't buying their massively overpriced cartridges. So they announced that they'd sell the printers at a profit. (Big part of the reason why what was a $400 HP-2055dn is now a $650 HP-2055dn.)