Let's compare wx with Focus Media. With the latter, you have the ability to reach thousands of people who are "local" by blasting your message in elevators, taxis, and subways. But, every one of those monitors cost big money. Furthermore, they are not interactive, and you also need to pay "rent" to the office building, shopping mall, or apartment complex in order play ball.

Meanwhile, anyone with a y1000 Android can accomplish the same via wx. And, the advertising doesn't have to be obnoxious.