Must All Media iPad Apps Be Magazines? TweetMag the Latest

Richard MacManus, ReadWriteWeb via NYTimes: "Seems like every new media iPad app these days wants to be a magazine. TweetMag is a new content aggregator based around Twitter users, lists and hashtags. It basically focuses on one of Flipboard's features (tweets as content) and expands that concept further. What TweetMag does is look for tweets that include links, then displays it in a magazine format. It starts by creating a 'magazine' out of your own Twitter account, but also offers a collection of popular Twitter users and lists in categories such as Entertainment, Art & Design and Music. ... " I still don't get how the people behind TweetMag, Flipboard, etc. expect to make money.