The bigger problem is that you don't have any way to measure the success of a daily deal. Yes, of course you are going to lose money when doing the promotion...that is your "cost". If I want people to see my website and I pay an ad-network for clicks, I will get a bunch of costly low-quality users who did not discover my site organically. But the difference is that I can track people who come to my website and see how much they spent not only on Day 1, but on Day 365. And there exists some customer lifetime value that should in aggregate be more than your acquisition costs. Unfortunately you don't have that data and the best you can do is guess, which doesn't put much faith in the daily deal sites.