The whole EA network is a result of Dieselgate and all the planned buildout (including cycle 4) is required under the settlement terms.it will all depend on the demand. If there is money to be made they will build the chargers. It will hit the tipping point in 3-4 years IMHO
For continued expansion it is very likely that they will need funding/participation from automakers. The ROI on a DCFC installation @ $.40/kWh is never.