5 Hurdles for Group-Buy (1) Impression among retailers that running group-buy promotions is not profitable (2) Perception among consumers that group-buy deals encourage needless spending (3) Idea among end-users that group-buy refunds are rare (4) One bad experience and retailers don’t come back to the platform (5) Deal constraints make buy-in tough for retailers (e.g. minimum 50% discount)

The Numbers Behind Groupon’s Meteoric Rise