Is Groupon worth it?

I was on Groupon this afternoon. I noticed a photographer offering their services and a 16x20 print for $49. He had sold over 120 of these vouchers. Sounds like a good deal. Hmmmm... let's read the small print and do the math. Expires Feb 27, 2013. Let's cross off Sundays and holidays, that leaves about 48 days to redeem all the vouchers. Now, Groupon gets $25 of the $49 sale. So the photographer is photographing almost 3 families each night for less than $25 each, minus the cost of supplies. What kind of family heirloom to you think these families will end up with? One worth less than $25!