Groupon has a huge mailing list and a lot of demographic data. A company like Pepsi or Home Depot could pay $0.10 per e-mail to send a coupon out to 10 million

Groupon has a huge mailing list and a lot of demographic data. A company like Pepsi or Home Depot could pay $0.10 per e-mail to send a coupon out to 10 million people. That's $1m, and there are enough companies with that in their marketing budget to make it viable. What matters is whether or not Groupon realizes what they have.