Right now I don't believe there is anything that benefits a potential buyer by having a referral other than you might receive a $25 gift card if you specifically mentioned that promo when you spoke to the guide.
The person that referred you would qualify for the $25 gift card, and if you actually buy a membership they will receive a reward ranging from $200 to $1000 depending on how many people they have already referred this year (you are allowed to have five each calendar year).
In the future they may have a "Friends and Family" promotion where you would receive extra $$$ off with a member referral. They've done it previously and I feel like it will be available again this year, but don't have any information on the timing.