Tickettts! Ticket please!
Apple’s decision to require users to buy an iPhone app before reviewing it has already improved the quality of comments on the App Store. If you’ve wondered why Apple let those no-pay riders on the train in the first place, it was probably to get the App Store rolling, to give it a good launch—Everyone’s welcome! Come right in!—but now that ridership is up, time to start punching tickets. See your ticket, Ma’am?
This only works of course because Apple knows when you’ve bought an app, and it only knows this because the App Store is the only place you can buy the app.
For all of its problems, this train does run on time.