mastodon.world is one of the many independent Mastodon servers you can use to participate in the fediverse.
Generic Mastodon server for anyone to use.

Server stats:

12K
active users

Sam Nicholas

can set up their own servers. It is super simple and most companies have an IT departments.

If not, plenty of (on platforms such as Fiverr, Guru, Upwork) and out there who can help you for a very low price

Bonus: Your social presence need not be dependent on the mood of one person. Be completely free!