Even worse, if you subscribe to the ink service with an HP printer, it will update the firmware. But if you decide to cancel the service, they don't change the firmware so you now own a brick.
If you print regularly, HP's 6 cent per page, 100 pages per month plan is about the same price as a small black and white laser's drum and toner.
But you can plan full page photos on photo paper with it for that 6 cent too, not just BW documents. I like it, a full year costs about the same as 1 set of XL OfficeJet ink and you never have to try to save money by going BW / draft mode. Just print whatever. Clean the head whenever needed. It's all included.
Yes it is a subscription, but this one is actually useful. And it gets cheaper the more you print, up to small office volumes. We have it at multiple offices on a 300/700 pages plan.