I doubt CHAdeMO pricing was a factor for them, as it's irrelevant to their plans.
EVgo pricing may be a factor, but as they remain mostly restricted to urban areas, EA still has a virtual monopoly on rural interstates. We can all be thankful that California is forcing the change, as per kWh pricing is both the fairest and easiest to compare, once we get enough stations to provide competition.
What I want to see is price/kWh vary by charging rate, to give us the equivalent of Regular/Mid-Grade/Premium, and which should keep the higher rate chargers free for those who need them.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].
The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.