The basic product is cheap or given away for free. The consumables that are needed to use or operate it, on the other hand, are expensive and sold at high margins. The initial product's price lowers customers’ barriers to purchase, while the subsequent recurring sales cross-finance it. Usually, these products are technologically bound to each other to further enhance this effect.
How they do it: Gillette is the name giver of the razor and blade business model. Selling its razors at a loss / at cost, it creates a lock-in effect and can make a profit with consumables compatible with the razor, which has a significantly higher profit margin.
Learn more about Gillette →
How they do it: Although the iPhone is not given away for free, Apple uses it as a platform to access to much more revenue opportunities through apps and other services beyond the pure hardware revenue.
Learn more about Apple iPhone/AppStore →
How they do it: Although the iPod is not given away for free, Apple uses it as a platform to access to much more revenue opportunities through apps and other services beyond the pure hardware revenue.
Learn more about Apple iPod/iTunes →
How they do it: Hewlett-Packard sold both inkjet and laser printers individually as well as in multi-function products incl. scanner, copier and fax functionalities. Whereas the electronic products were sold at low prices, the company earned a lot of money with the special ink cartridges as a consumable.
Learn more about Hewlett-Packard →
How they do it: The Sega Dreamcast was launched in 1999 for the price of $199, and video games for the Dreamcast were sold for $50-$70. With any customer owning on average multiple games, this resulted in recurring add-on revenues for Sega. These recurring sales of video games were cross-financing the cost of the hardware.
Learn more about Sega →