Then you better call the SEC and tell them that Tesla is "spreading misinformation" in their 10-K.
Sayeth Elon and his accountants and securities lawyers:
"Cost of automotive revenues includes direct parts, material and labor costs, manufacturing overhead, including amortized tooling costs, shipping and logistic costs, vehicle internet connectivity costs,
allocations of electricity and infrastructure costs related to our Supercharger network, and reserves for estimated warranty expenses."
see
SEC Filings | Tesla Motors
Also, in 2015 they only spent a total of $58 million under their marketing line item. That did not cover the supercharger expense and all other marketing expenses.
In 2015 they sold about 50k cars. at reserving $2k/ for each car for supercharger expense, for those cars, gives them $100 million from those cars to contribute to fund the pro rata supercharger expenses (infrastructure and elec) for those cars during their lifetime.
Supercharger facilities and the electricity that they use is booked as cost of goods sold, allocated to each car, just like warranty reserves. And just like warranty reserves, they might allocate too much or too little. It is not a marketing expense.
Maybe their budgeted cost is $1000/car, maybe it is $2500 per car. The price at which they charge old 60 buyers to enable gives a sense that it is probably in that neighborhood.
Also all the hardware is in all the cars. They enable supercharging by flipping a software switch. The charge is to contribute to the annuity like reserve the fund the supercharger expenses. Anyone who understands what an annuity is, or a warranty reserve as cost of goods, can understand this simple concept.