This is certainly a growing trend which was first started amongst end-users themselves, and slowly we've seen a few news media outlets also following suite. So far, only a very few government agencies have actually followed. Coming to mind are also The Netherlands. What is attractive for many organisations and agencies on Mastodon, is that...
I think the lack of an algorithm to keep you engaged is what makes it better than Xwitter, and the main reason why I have a mastodon account, but I never had (nor ever will have) an account on Txitter.