Basically, to "unlock" a deal and make it valid, a certain amount of people will need to purchase it. The amount needed to unlock a deal can differ per offer (usually it's between 1-5 purchases). For example, if a deal requires 2 purchases for it to unlock, 2 people will need to buy the offer before it goes live. If the deal ends and only 1 person made a purchase, the coupon will not be able to be used, and no charges will apply.