When you select a PINTA! on TapIn, you can choose to participate in group buying by joining the Tribe. The more people that join the Tribe, the better your chance of receiving the PINTA! at the discounted price!This encourages you to share links to the item you are buying with friends, family, or social media.Each PINTA! has a minimum number of Tribe members required to complete the purchase. If that number is not met within the seller's time frame, then the Tribe buy is canceled, and those who have already committed money will be refunded.There is an option to buy the item directly, but the product's price is higher than buying it in a Tribe.