When you buy a new HP inkjet printer, the setup software strongly encourages you to sign up for the company’s Instant Ink service. It sounds like a good deal on the face of it—every time you print a certain number of pages, HP will send you a fresh ink cartridge without you having to go buy one yourself.

The reality is not quite so sweet,

Source: Hot Hardware – HP Printers Accused Of Loan Shark Shakedown Of Owners With Sketchy Ink Subscriptions