Medium should be applauded for starting a Mastodon instance (me.dm).
Far better that they run their own instance than piggyback on a volunteer-run instance. Which was what they were doing previously (medium@mstn.social).
Every for-profit corporation should be running their own instance. That should be the norm.
Is this a "win" for the Fediverse? No -- and people like
@aral are right to be skeptical. I share that skepticism.
Nevertheless, this is a step in the right direction.