Budweiser temperature related couponing mobile app

This is an interesting idea by Budweiser. the hotter the weather, the better the beer promotion. If it gets really, really hot, you get the bud for free. Otherwise, you get 1€ or 2€ off. The mobile app tells you which rebate is on. (See Adverblog for Screenshots of the app!)

Here is the commercial related to it (enjoy the „old spice“ style of the video):