That API was already reasonable before he took over Twitter. It was prohibitively priced afterward. You are making arguments out of things where there is objective proof otherwise. Anyways, I think he cut aid programs and fired a bunch of people too. That's a whole nother' matter though (I'll drop the whole holistic argument).
For example the firehose/streaming API more or less require 5 grand a month, so off limits to a indie dev. Does he not even have solidarity with developers?