We took delivery of our Model Y on 12/13, and were told the free year would apply. Also told our self-referral would apply.
Supercharged on 12/22, and website Account/History shows an original balance of 400 kWh, 40 for that charge, balance 360. But still after 1/14 there was no free year to be found.
Now I get a different answer by looking at the the website, Home/Manage/Details and it says free "Free Supercharging until January 1, 2022". Until recently it said Pay Per View or some such.
However, to get a third, different answer, I now look in the app "loot box" and see "Free Supercharger Miles Remaining 900, Expires 12/13/21".
Perhaps the 900 miles in the loot box is the same as 360 kWh balance in the history, computed at .4 kWh/mi or 2.5 mi/kWh, but those factors do not match the car's specs. Any ideas?
In any case, it appears that the referral miles and the free miles both expire in roughly 1 year, making the referral miles moot. I do wish I'd used someone else's referral code, maybe next time I buy a Tesla. ;-)
SW