How many loyalty cards do you have?

In a recent blog by Robert J. Howard at Customer Think, he addresses the loyalty card subject I'm sure we all have dealt with. How many loyalty cards do you have on your key chain right now? He points out that businesses have overrun the customers' wallets with loyalty cards, and the market is at the point of saturation.

It all began with rewards for airline miles, then hotels, and now it's moved to restaurants, grocery stores, gas stations and to anything imaginable beyond that. So what do customers do with their addiction to their rewards? How do businesses find a way to still reward their customers who frequent their business? Do you have a solution to this current plastic crisis?