If you go to wolframalpha.com on your iPhone (or iPod touch), instead of an optimized version of their website, you now presented with an intercept pop-up advising you that you can go to the App Store and get your $50 premium experience on.

Were too many people not buying the app when they could get the going to the web for free? And is this the best way for them to handle it? Let us know what you think, we already have an idea what they'll say...