Функционал модуля - совместные покупки.   http://www.livingsocial.com/deals/617586-luxury...
Описание функционала ниже:   1) Refer to friend promotion on every product page of our website - example   http://www.livingsocial.com/deals/632296-photo-...   Want it for free? Buy first, then share a special link. If three friends buy, yours is free!   2) Once order is placed by customer, they should receive the special link in email which they share with their friends   3) When 3 more friends purchase the product using the special link, the customer who provided the special link to them should get 100% refund of the order.   4) All this should be automated i.e. no manual intervention required from any of our staff members in this process.   5) We need legitimate referals and redemptions on this.   6) Refer to friend setting should be flexible so that we can increase or reduce the number of friends required to buy e.g. instead of 3 friends, we can increase to 5 friends or reduce to 2 friends etc.