Install TDF owned Mastodon instance
Like discussed on the website mailing list (https://firstname.lastname@example.org/msg15526.html) and today on the infra call (https://pad.documentfoundation.org/p/infra), please install a Mastodon instance at tdf.social for example.
When done, we will be able to migrate the LibreOffice account from Fosstodon to our own instance. This is possible since Mastodon 3.0 (https://blog.joinmastodon.org/2019/10/mastodon-3.0/).
This mastodon instance must be locked down. No account shall be authorized to be created. Only our own TDF and LibreOffice accounts should be created/authorized.
A friend of mine owns mstdn.io (10K accounts!) and is able to give configuration advices if needed.
ETA: end of Q4 2019.