It doesn't matter how many people are using #Mastodon at this moment. It has reached enough of a level of critical mass that the idea will carry forward and be improved. That's enough gas to get to the next station.
@ernie I hope you are right, world wide where Twitter is/has been used. I wonder about one aspect, persons who flee for example Saudi Arabia have gotten help via Twitter - I wonder how Mastodon can meet such usecase?