In addition to tracking the printer’s online or offline status, page count, and ink levels, your rented printer will look at the types of documents you’re printing (e.g., PDF, JPG, Word), the types of devices that initiated the print job, “peripheral devices,” and other “metrics” related to the service, the All-In Plan’s terms read. This is on top of the personal information HP collects upon initiating the plan, like your location and your company name (if you have one). By signing up for the service, the terms say, you “grant to HP a non-exclusive, worldwide, royalty-free right to use, copy, store, transmit, modify, create derivative works of and display [your] non-personal data for its business purposes.”
One of mine has been using the same toner cartridge for 8 years. It's almost empty after nearly 3000 pages.