This reminded me of the HP instant ink [1] printer I once-upon-a-time bought. They would entice you with a 'free ink' service, where they sent you some ink on

This reminded me of the HP instant ink [1] printer I once-upon-a-time bought. They would entice you with a 'free ink' service, where they sent you some ink on a regular basis. But woe betide you try to supplement the free ink with some shop-bought ink, as the printer monitors how much you use and will automatically order the amount consumed from HP. There's no point buying any cheaper third party ink - you'll always pay for the equivalent HP ink as well. [1] https://www.ldproducts.com/blog/the-fine-print-8-things-you-should-know-before-signing-up-for-hp-instant-ink/ https://www.ldproducts.com/blog/the-fine-print-8-things-you-...