I recently completed a 1500 road trip, relying on the supercharger network to keep the battery charged. My Model 3 is a RWD LR that I took possession of in June. What surprised me on this trip was that after supercharging, the charging display showed a $0.00 fee each time and I can't find any supercharging charges on my credit card. I haven't done anything that I know of to qualify for free supercharging. I'm not complaining, but I also don't mind paying for supercharging to support the growth of the supercharging network. Or is it just that Tesla accumulates the charging fees and only charges my credit card once a month? Any ideas?