From the Washington Post:
Jeff Kinney has worked full-time for a decade designing popular kid-friendly Web games. He also writes stories, but his best-selling series, "Diary of a Wimpy Kid," was originally published online, not in a book. This free online version regularly gets 70,000 hits a day.
If he can capture the attention of so many teens and tweens on the Internet, what is he doing still publishing books on paper?
"I feel like I am hedging my bets by keeping one foot in the print world and one foot in the online world," Kinney said. "I think a book still has a special kind of magic." Plus, as a practical matter, there is no financial incentive for authors to give their stories away for free.