No one outside of tech nerds or PR departments is going to get seriously into Mastodon. My wife and her lib/moderate friends checked it out and went right back to Twitter. Too confusing, one husband was banned from one instance and caused issues getting onto others, hard to understand why.
I know from personal experience that this is exactly wrong. Most of the left-leaning blue-checks that I followed on Twitter became mastodon users starting about a week after he carried the literal sink in through the door. It accelerated during subsequent events. While I still laughed when Paul Ford recently characterized Mastodon as "socialists who solder", the truth is that far more ordinary folk than I thought possible made it past the senseless UX hurdles that Mastodon makes new users jump over right away. I was amazed.
This new policy against sharing Mastodon links makes me think their numbers are showing an exodus of users toward it.
