I actually don't know. I've been on massdrop for a decent bit of time and never think about this issue. Some massdrop colabs have a MOQ (minimum order quantity), meaning it's all or nothing. If the minimum quantity is not met, you don't get charged, the product doesn't get made. Standard drops like the CRKT knife, have multiple price points that get unlocked when more people join. What I think happens, if the lowest price point isn't reached. You get charged and you still get the item.