Ford doesn't invest in gas stations, news at 11. The better question is why Tesla chooses to invest in their network?
Chademo is not an acceptable long term solution, it is far too slow for interstate travel, and a 150 mile electric fleet will make it mostly useless for most in-town travel. Only those who drive 100+ miles a daily will visit them regularly, and for them it will be a frustratingly slow charge time. Someone doing that much driving everyday will quickly tire of sitting at the charger for close to an hour everyday. So far the installations are just one or two at a spot making it likely someone else will be there when you arrive, and that you will be screwed if it is broken. Chademo is a flawed system that has been half heartedly rolled out. It will only fill a small gap of folks who want to take regional trips, or for the few adventurers who won't mind spending a third of their interstate travel day waiting at the charger.
Level 2 will cease to make sense even in-town once we have longer range car except at work, home, or at travel destinations such as hotels. Work charging will become less necessary and less attractive to employers as range increases as well. Interstate hotels are one the the few places I can see Level 2 stations being added in great numbers, a place they don't make sense at today but will in the future.
Tesla's system nails the important points for a good system. The stations have many stalls, making it unlikely you will have to wait a long time. The charge rate is fast enough that a long trip will have less than 20% of your time wasted at the charging station. Lastly, the cars themselves let you drive for a couple hours on the freeway between charge stops.
So Tesla has it right, but why do they bother? It looks to me like they are a premium brand that needs to stick out from the pack. Their 85 kWh battery option would actually be pretty stupid without a good infrastructure to allow interstate travel. 80-100 miles is plenty for most commuting, so the primary need for anything much bigger than 100 miles road trip capability. So Tesla couldn't reasonably do a big pack without also rolling out a charging network, and being a premium brand it had to be better than Chademo (what a stupid name, right up there with EVSE for awfulness).
Today's Nissan Leaf is a good little commuter car, but to roll out a bunch of Chademo stations would only address a vocal minority who commute long distances or who are trying to be a Leaf only house without wanting to rent a gasser for occasional longer trips. For the vast majority home Level 2 charging, and maybe work charging is plenty. A double range Leaf will probably still not make it a decent interstate car, and it will make it even more likely that people will do virtually ALL of their charging at home where it is cheapest.