Now now, if you look up Iowa fast charging and Nebraska fast charging, each has a program in flight which included i80.
I have driven Iowa and Indiana in my Plus without getting stuck, but would certainly welcome redundancy with more chargers.
I had lunch today with a vendor from the Bay Area. He believes Tesla is starting to increment prices in the Superchargers to start turning profit out of the stations. I have no basis for truth or accuracy, but he quoted paying close to 40 cents per kilowatt in CA at the stations. (He drives a 100D, but without free supercharging)
If Tesla charges “per mile” and is able to slowly increase real or assumed miles per kilowatt, by upping the equation, they increase the cost of power/charging.