Four panicky days later, Jirbo junked the subscription model and turned to advertising--on the Jirbo site and embedded in games--for revenue.

FORBES: iPhone Apps In The Works

Compare that with the Trojan Horse strategies of rivals Claria (once known as Gator) and WhenU: Their software is often embedded in games or screen savers that many people download unknowingly. (The companies insist they give fair warning of what you're downloading in their click-on licenses.) "No need to be obnoxious, " says Keith Smith, 33, who founded 180 in 1999.

FORBES: Mr. Manners

The Galaxy Note 10.1 comes with a range of software and games embedded and a selection of apps to download, with over 100, 000 free downloads available in Samsung apps.

ENGADGET: Samsung adds more S-Pen friendly apps for British Galaxy Note 10.1 users