1) I'm hanging out with Family in Abbotsford, British Columbia, and wherever I go browsing, I'm getting Groupon Ads for interesting things to buy in Abbotsoford. I've been half tempted (for the first time in a long time) to click on these ads. There is 0% chance I would have considered going to these places without those ads. If I find something new and interesting, there is a very good chance that I (or my family) will return as repeat customers.
2) My mother, is trying to figure out how to attract new business into her Coffee Shop for a new line - just to let people know it exists, and is considering a groupon deal.
If, in fact, groupon has a sustainable profitable model in their existing markets, and the $950mm Series G is there to expand the same model into other markets, and, if they have no entrenched competition in those markets - then this move makes absolute sense.
Time will tell if all of these conditions hold true.