supercharging

I used about 99kWh and added about 210 miles to my Cybertruck (CyberBeast configuration). Yet, Tesla changed me "307 miles" of my 2000 FREE Supercharging Miles. I guess it's calculated by kWh? Does Tesla declare ANYWHERE? how they calculate the credits for the "Free Supercharging Miles?"

Via Teslarati Tesla plans for Cybertruck-specific Supercharger spaces September 23, 2020 Tesla is preparing for the eventual rollout of the Cybertruck by offering plans on wider, longer charging spaces at Supercharger stalls. A recent proposal by the Pasadena Water and Power Department in...