This is Groupon's best product to date. I don't know about everyone else on HN, but I feel like a good majority of people I know have at least bought one Groupon by now, where their credit card is stored. To take that major advantage and apply frictionless rewards for users, is recipe for major disruption.

Checking in to a place on Facebook and FSQ is almost entirely useless for a small business. They need $$$, not someone looking to get 10% off for letting their friends know they are at a place they probably are all well aware of. I hope Grocery stores sign up for this, so for once in their history they can make use of their 'loyalty program', which probably has over 10,000 purchases tied to my phone number for almost no purpose at all.

I'm not saying this is perfect, but this is the first product i've seen in a while that seems like useful software.