Rivian just updated it’s referral program, and it’s pretty incredible. Each referral gets 750 points (1 point = $1, so $750 to use on a new vehicle or accessories), plus 6 months of free charging on the Rivian Adventure Network.
Only 100 referrals gets you a free Rivian 
Might as well start here:
https://rivian.com/configurations/list?reprCode=ARCADY1760486
Update: the program is now for 500 points ($500) for the referrer and the referree. This can be used towards accessories or a new Rivian. There are some additional limits for referrers once you have 10 referrals. That said, I presume this is a good place for people to share referral codes for others that are buying/leasing Rivians.
My referral code for anyone interested in receiving $500 Rivian credit: JONATHAN1866848
If you already placed an order and haven’t taken delivery yet, it is usually possible to ask your Rivian Guide to add the referral code to your order before you take delivery.