https://www.techradar.com/news/tesla-is-ending-its-free-unlimited-supercharger-referral-program

Tesla is ending its generous referral program, which gave new owners free access to its network of Superchargers. From now on, rather than a lifetime of free juice, the first five buddies you refer will only get $100 credit to charge up their new Model S, Model X or Model 3 Performance.

Superchargers are the fastest way to give your Tesla's battery a boost, and can complete a full charge in just 30 minutes. They're typically placed on the outskirts of major cities, and are intended to make long-range driving more convenient.