Is it worth being tracked around the mall to get a $5 gift certificate?

Read this interesting NYTimes article:  http://www.nytimes.com/2010/08/17/technology/17app.html?_r=1&th&emc=th

Is it worth giving up privacy for points that will eventually accumulate to a small amount of credit or cash at a major mall store? Or is it worth it for points on a Facebook game such as Farmville . . . or for a free music download?   Maybe and maybe not.  What makes Shopkick different is that your actions, including entering a store and even such actions as picking up an object to peruse it will now be tracked and add points to your total.  All this will be done with your iPhone (and soon the Android will also have this capability.)  By the way, Shopkick will also add points when you enter the dressing room.