More supercharger site speculation than news (sorry) but if I was Tesla and was forced into screens displaying prices and card readers etc. Given that the majority of customers would not use them since they would be ether Tesla's or using the app, if I had a site of say 16 chargers I would set up 4 terminals spread through out the site ideally rain covered each of which could be used for any of the chargers.
You plug in. walk up to the terminal a couple of meters away, enter the number of the charger, pay and the charge starts. Slightly less convenient for the user than a screen and reader on every charger but the advantage, apart from cost, is that if any one screen or card reader failed no charger would be put out of action since there would be x more.
Not common in the UK but in other places a lot of petrol stations work like this in that you go up and pay first then fuel. putting a screen and card reader on every charger makes sense went you are installing in pairs in McDonalds carparks but good luck getting 99% availability when every charger can be put out of action by a faulty screen or card terminal.