For anyone on the fence to pull the trigger on a Model X or S (like me) note that as of Oct 1st. Tesla policy changed that you must order by October 31st in order to get the $1000 referral credit. If ordered before Dec 31st we would still get the free supercharging only. Previously I called Tesla customer service and was told that as long as we ordered by Dec. 31st we would be eligible for $1K referral credit and free supercharging for life. Looks like Tesla no longer thinks thats ideal for them for whatever reason, Personally I was waiting till Dec. to pull the trigger on my order in order to maximize any changes and to get a "2018" Tesla (yes I know it doesn't matter but it may be of some value for resale purposes later... who knows). I still think waiting to order later is better as the $1000 credit is a nice to have but thats me.