So after too little sleep last night, I was talking to @Posty this morning about how RoCur is so big for me, but how I didn't think it could work here - but then realised that, from a technical point of view, Mastodon is actually a lot better.
Looking at the Twitter approach, if you want to run as a team, you've pretty much got to use Tweetdeck as a client to get different security levels. That's no good for RoCur, as hosts (or curators, I call the person running the account a curator,)
...will be using their regular clients. Which brings me to security. One password for the account, one email address, one phone number - and you're handing that to someone you don't know. What if you have a few admins? That's a lot of people with access to ONE account, and a lot of faith in Twitter Support if something goes wrong.
So how can Mastodon do this so much better?
For now, see https://werworld.org - if anyone fancies doing this over here - and it will likely be very quiet at the start - please do get in touch.