I think they would do wise to phase in payment for charging slowly. If they don't they will scare away potential users. I doubt it will be possible to make money on charging stations until there is enough EVs out there that the ones that need the occational charge away from home cover the costs.
I have been driving an EV for seven years now, and do most of my charging at home. I only charge when away because it's free, but occasionally I have to charge. If charging was as expensive as fossil fuel, I'd charge at home only, except from those few occasions (two so far) where I really need (fast) charging.
That said, I suppose we should all use paid charging occasionally to help the builders, since if we don't pay they won't build, and if they won't build we can't charge.