Thanks to Chris Gosling for passing on this story about the perils/rewards of inertia marketing.
Imagine you went into your local pub and was charged you £7 for a pint of beer. You paid them, drank the beer and departed. Next time you visit you are charged £8; you pay, drink the beer and depart. This continues until the end of the week you pay £12 for a pint and then a friend taps you on the shoulder and asks: “why are you paying four times more than me for the same drink?”