An average fan may participate with a brand ten times a year and will make one recommendation. But an active fan may participate thirty times and make ten recommendations. The impact this has on fan value is quite dramatic. In the case of Coca- Cola, the best case for fan value reaches $316.78 but is $137.84 for an average fan. In the worse case scenario, a fan is worth $0.

From: http://ping.fm/ackHP