It's called a continuity sale, and variations of it abound all over the place. If you've ever seen or used a business punchcard -- you know, those "buy five pizzas, get one free" deals -- you've seen continuity sales at work.

Here's the thing: they work in virtually any service business to increase the number of sales you'll make.

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Author(s): Trent Hamm
Original Source: American Express OPEN blog