I've been on Mastodon for 2 weeks and I'm up to 7,900 already.
The numbers on Mastodon are pretty impressive. More importantly, my timeline over there is full of interesting people talking about a variety of interesting things.
He tweeted his mastodon link that got 44 retweets.
He talked about mastodon (no link) and got another 59 retweets.
He also put mastodon link on his profile.
I mean those should help build his followers on mastodon by a large margin.
But despite those reasons, the activity this represents still works as a counter to the claim I was replying to here that "no one is switching to Mastodon".
That, plus Mastodon does not benefit from central spam account squashing authority.
Of course, the discrepancy of follower/actual reader numbers also exists in case of Twitter, but if I had to bet I'd say it has the potential to be stronger on Mastodon.
Let's not kid ourselves. You are already famous with followers. That is the biggest reason you can grow followers quickly on Mastodon.
I had Mastodon and tweeted about it too. And I have 5 followers compared to 200 something followers on twitter.
The numbers don't matter to me as much as whether or not I get to do that.
The only part of my follows left on Twitter now are the people producing the average low quality content (gossip, memes, current drama etc.)