There is usually a perk (changes from time to time) if a new member purchases as a result of a referral by an existing member. It can be some credit to dues, a gift card (believe last one I heard about was referring owner getting a $250 or $500 gift card to spend on Disney), or something else. So the referring member will likely get something.
Also, some times (although I do not think it exists right now) there have even been additional perks to the new member buyer if he was referred by an existing member, e.g., for a while, a new buyer who purchased AKV on referral was getting a $500 gift card that other new buyers were not getting.