It's a fair point but iff you neglect that the overwhelming revenue drivers for these services are large corps who are already locked-in.
Devx doesn't matter at all once you're there.
The myopathy among us "online people" is assuming number of voices here and elsewhere correlate to revenue.
Just fyi, myopathy is a general term for diseases that affect some types of muscles, while myopia is short-sightedness -- assuming the latter is what you were going for!
It could encourage more development and adoption and lead to being a net-positive for the revenue.