Not exactly. From the
referral details: "Free unlimited Supercharging will only apply to the original vehicle owner and only for the duration of original vehicle ownership." So only for you while you own the car. It doesn't transfer with the car, and it doesn't transfer to a new car you buy in the future.
We're saying the same thing. Whoever buys
via a referral before 31 Dec 2017 gets a S/X with unlimited supercharging (but not transferable to future owners) but does not get unlimited supercharging for any new S/X she or he would buy. But in that scenario 3 she or he still gets a car with unlimited supercharging (which is better than scenario 4 - well at least until Tesla changes that...).
On the other hand, I don't agree with other posters saying that Tesla can go back on its promises (as it never did, in respect of this supercharging issue). Tesla promised in 2013 that (existing) cars would have supercharging "for the life of the car" (and that has always remained true). Now Tesla is saying that if you, as existing Tesla S/X owner, buy a new S/X, your next car will have supercharging for life, and I don't think they can come back on that either. Only true for your next car however; Tesla isn't currently saying you can benefit from that for your five or six next cars.
Same thing for the (first ownership) unlimited supercharging which people who use your referral will benefit from - Tesla cannot take that away.
But, on the other hand, Tesla is only promising what it is promising, at that's quite ring-fenced. I like it anyhow, and think it was a good move on behalf of Tesla, in terms of making us 'early adopters' evangelists and showing that we 'deserve' something (i.e. unlimited supercharging for our next cars as well) which no-one else will get (well, until Tesla changes the rules once more).
But my point is: Tesla can change its rules whenever it deems appropriate, but not to the detriment of people who, on this supercharging issue, decided to buy the car based on the supercharging 'rights' they would get based on Tesla's statements which incited them to buy the car. Tesla knows and respects this, I think. Up to now Tesla in any case has respected this, as far as unlimited supercharging is concerned. And today Tesla goes even further in its commitment towards early adopters.