Apple stores, Drugstore Wars and the use of "offer a brick to win a gem"

Apple Stores Success.
In an article in New York Times the author tells about the outstanding success of the Apple retail stores chain compared to all the competitors. The bottom line - he attributes the success of the stores to the "Genius Bar" located at every store and staffed with the diagnostic wizards whose expertise is available in one-on-one consultations — free. The offered ability to come and consult the wizards with the problems and to get the sometimes badly needed advice - that's what brings the people to the stores. They can also come and test the hard- and software before buying them.
The "genius bar" - "the brick" attracts people and as a result - sales.
Here is the New York Times article.

Drugstore Wars of the 80's.
In the great Drugstore Wars of the 1980's the competition was equal across the board. One chain of stores broke the deadlock by offering blood pressure machines in their stores. Customers could wander in, sit at the machine with their arm in the automated cuff, and have their blood pressure taken for free. No hassle, no pressure to buy anything, no charge for the service. Each machine was placed back in the pharmacy section so the customers walked the length of the store to get to the machine.

Equipping each store with an automated blood pressure machine required an investment, but it turned casual customers into consistent customers. Thousands and thousands of people suffer from high blood pressure, and the handy, free reading prompted them to use this certain drug store chain whenever they needed any of the items stocked there. They could pick up what they needed and check their blood pressure. Thus, the outlay of a few thousand dollars per store, with maintenance of a few hundred dollars every year, returned thousands of dollars more in revenue and profit.

See definition of the "offer a brick to win a gem" strategy.