What is an example of a bait and hook in econ?

A classic example of a bait and hook business model is the printer and ink cartridge scenario. The printer is sold at a low price (the bait), enticing consumers to buy it, while the ink cartridges, which are necessary for the printer to function, are sold at a much higher margin (the hook). This strategy ensures ongoing revenue from customers who need to purchase ink regularly after acquiring the printer.