Why do semi owners have to buy electricity from Musk?
Essentially they can use the patents if they accept something stronger than patents: no copying Tesla's unpatented designs or they can go back and get you for the patent violation in perpetuity (or statute of limitations).
what we got is a truck that no one knows its weights so you can't tell how much it can move in cargo, that costs two times more to operate with a very limited range unless you want to destroy your batteries really quickly but hey they did engineer the best phone charger for it....
I got that "electricity is 0.50" is a claim not backed up by reality.