How is CashOff different than Groupon and Living Social?

Cashoff is better for the consumer because in most cases he/she does not have to put out money up front and then often lose or not use the pay in advance vouchers.  Instead, CashOff is more like a coupon and you often get them for free by sharing them with your friends.  From the merchant's perspective, CashOff is much better also, because it is substantially less expensive and it spreads their deals all over Facebook and Twitter when consumers share them ,in order to get them free.