The title of this thread should really be changed. First, I get that LivingSocial is of the same type of business and hence was mentioned in the title but then its more than just Groupon and LivingSocial.

Second, it's not Groupon that is engaging in the questionable practices. When you're going through massive deals like this, it can be easy to miss that the retailer you're doing business with is pulling a sly one on you. It's not uncommon to get a separate link and to think that some on here would believe that Groupon should thoroughly go through every link and verify for price discrepancy that may show up is unrealistic.

Lastly, it's also not uncommon for coupons to be honored on original prices rather than sale prices.