Evernote, a free storage app, seeks more paying users - NYTimes.com

GIVING away a product has always been a great marketing concept. Even an unsavvy consumer can see a benefit in snatching free products. Free has also become a mantra for business gurus who advocate giving Web start-ups a shot at fast growth by bringing the price of most of their

But as a revenue generator, free can come up short. Sure, it attracts customers, but the challenge is to find someone to pay for it. Although thousands of businesses offer free services online — two of the biggest are the Flickr photo service from Yahoo and YouTube from Google — few can claim to be profitable. (Analysts say Flickr and YouTube are not.) While free is an enticing proposition, it is very hard to make it work...