That isn't at all true for Mastodon. Despite a very significant drop a while after the influx from twitter, looking at a few different sources it has twice as m

That isn't at all true for Mastodon. Despite a very significant drop a while after the influx from twitter, looking at a few different sources it has twice as many monthly active users now (~600k before influx to hovering around ~1.2M for a few months now after the slump.)