Because many of us see the bigger picture - that apps like this are largely a gimmick. Yes, perhaps they think it is to drive advertising, but some of us are saying that from a broader perspective, this is money mis-spent, as what drives repeat mobile visits are websites that work great on mobile platforms. Most apps are never used more than a couple of times after being downloaded, and most website apps only offer a fraction of the sites overall content. Sure, maybe they'll get a temporary bump when it's first released, but in the end it will most likely be buried in the 100,000 other apps when they could have invested the effort into the website which would be a better long-term investment.