It's a deviously smart trick, because people who let their subscriptions lapse probably really need to get something printed right when they find out about this restriction. You then have a choice between running to the mall and buying a new ink cartridge (or more realistically, a full printer, because those are cheaper) or paying for another year of ink subscriptions and continuing the print right away.
Friends don't let friends buy HP consumer printers. If you can get your hand on a second hand laser printer you'll probably be happy for years, but their inkjets are manufactured e-waste.