Agreed. She should have constrained what it could be applied to so she could manage her losses. If I was going to embark on a Groupon campaign, I'd want to look at how much money I would lose per Groupon and then figure out how many Groupons I could afford to sell.

If you just open the floodgates without calculating how much you can afford to lose, it's not Groupons fault, it's your own. Even a layman should be able to understand that you're going to take a loss in the short term, so don't allow yourself to take a bigger loss than you can afford.

She even makes it clear in her facebook post that this is entirely her fault:

"...I hung up and thought it over. I called him back and said we would have to get at least 50% to cover our costs of product… to this day I don’t know why I thought even 50% would be a good deal for us. Maybe because I thought since we were covering our food costs. What I didn’t think clearly enough about was that that margin we mark up is what covers all of our other costs… like staff, rent, utilities, etc. Our overhead is roughly $25,000/month, and this decision was about to make it so that we didn’t cover any of those other costs."