Even if you’ve never heard of referral marketing, chances are you’ve experienced it.

Maybe your mom held Tupperware parties when you were a kid or your friend is a Mary Kay consultant. While these are examples of direct selling, they’re also good examples of referral marketing – where passionate customers make extra money by selling products to friends.

But Tupperware parties are just the beginning of referral marketing’s possibilities – especially as fewer and fewer Millennials are willing to open their doors for the hassle of a party. It’s not that they don’t like the products; they’d simply prefer to share them on social media rather than invite friends over to look at them.…