It should be stated the purpose behind this analysis was not to dump on #Bluesky, but rather to create a framework for assessing progress of these networks to stated goals of decentralization. Note the #ATmosphere, while very centralized, is making progress. The trend line is positive, mostly due to users moving to #Blacksky.
The usefulness of this analytic is that instead of just accepting marketing statements we have a quantifiable basis using accepted statistical models to refer to.