I think the biggest mistake is that the groupon.com page is plugging to watch Super Bowl commercial and sign up.

If you actually follow through to http://savethemoney.groupon.com/ one can find that there are some serious active campaigns to aid these movements. If you donate $15 to Greenpeace you get $15 in Groupon credit. They're making it way to easy to hate them through this and miss some huge opportunities to help others.