<i>suddenly unpopular with both users and investors...</i><p>The first rule of bad journalism is to confuse the first and second derivatives. Groupon is enormously popular with users and investors--it's just not the most popular it's ever been. Yipit's fairly recent data indicate that while the daily deal market contracted slightly over the summer, but Groupon shrank more slowly than LivingSocial ( <a href="http://techcrunch.com/2011/08/25/yipits-daily-deal-report-groupon-up-livingsocial-down-travel-deals-take-off/" rel="nofollow">http://techcrunch.com/2011/08/25/yipits-daily-deal-report-gr...</a> ).<p>In "Fooled by Randomness," Taleb points out that the more frequently you measure results, the more random they are. Second-by-second, Warren Buffett is losing money just about half the time.<p>Groupon obviously has problems, and LivingSocial is executing amazingly well, but it should be laughable to call them "unpopular" rather than "less massively popular than at their peak a couple months ago," in the same way that you wouldn't call someone "poor" because they moved down a spot in the <i>Forbes 400</i>.