@animeirl @hfaust Why would any software project run a forum? It's different, but the drivers are similar.
They could have put up a server only for official Mozilla accounts, but I guess the above means they decided to invite the public and then they took the steps necessary to not get any embarrassing headlines about who they're hosting.
Or maybe they're adding Fedi to Thunderbird or something and want a default server they don't mind being associated with.