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HP wants you to pay up to $36/month to rent a printer that it monitors
(arstechnica.com)
This is a most excellent place for technology news and articles.
All printers do this to some extent, I think. A combination of never wanting to report a false negative plus manufacturers making most of their money on consumables.
One of the cheapie monochrome Brother printers we have at work has been bitching about replacing the imaging drum for about four years now. We just dismiss the message and it's been printing just fine this whole time. It still is.