And right at this moment, no one gives a shit about Mastodon.
Mastodon has a similar feel in that the content is amateurish and free.
As an anecdote, I use chaos.social and they are throttling signups because there are too many new signups. Maybe you will be surprised.
Will it be the biggest social phenomenon? Probably not. But it already has the critical mass to keep funding its continued development, and lot of interesting voices, if you know where to look.