A shopping site that offers users the chance to win their entire online order for free, regardless of the size of the order.
It’s an affiliate-based concept similar to cash back sites like fatwallet and ebates, but with a different approach. Cash back sites get a commission from online retailers for each referral and they share some of the commission with the customer as a cash back rebate.
For example, if the affiliate receives a 10% commission, they might share 5% with the end user as cash back. Using the same commission figures, the Purchance model is to give customers a 1 in 20 chance of winning their whole order for free.