The history of web analytics has read a bit like the quest for the Holy Grail. An aggressive push to drive short-term conversion, including the pricing scenario above, could also lead to a drop in long-term revenue and customer loyalty. If you offer a sweetheart deal that pulls in new customers, it’s possible that they’ll take advantage of that deal and disappear forever. Today’s Conversion Rate gain, if it’s driven by bargain hunters or impulse buyers, could be next month’s Conversion disaster.
http://www.seomoz.org/blog/when-conversion-rate-isnt-enough