This is a price increase, on top of the other price increases over the last few months.
Tesla factored into the purchase price of cars the projected life time cost per car for using the supercharger network. While some owners have been using the superchargers much more than Tesla projected (local charging and frequent long distance drivers), for most cars, it's likely they use 400kWh or less per year - at least most of the time.
In the 4 years we've had our P85, I'm guessing that for 3 of those years, we probably used less than 400kWh for long distance charging, so we wouldn't have been impacted by the new fees. This last year we made a 2500+ mile road trip - and would have had to pay fees for much of that trip, and any subsequent shorter road trips.
Since Tesla hasn't yet delivered the promised (by year end) details for the supercharger fee plan, we don't know how much of a price increase this will be.
We're planning to purchase a replacement for our P85 - and will include a projection of the lifetime supercharger fees when we calculate the cost for the purchase.
Until Tesla can sustain profitability OR they see demand drop of the Model S/X (due to high prices) OR they start seeing competition for the Model S/X (at lower prices), seems likely Tesla will maintain their current prices, and if their costs drop, they'll keep the additional profit to help cover their costs.