cosocial.ca is one of the many independent Mastodon servers you can use to participate in the fediverse.
A co-op run social media server for all Canadians. More info at https://blog.cosocial.ca

Server stats:

146
active users

Evan Prodromou

@stefan @Gargron @ricmac Sure. It's also absolutely invisible to users; you can have a fulfulling and engaged social life on a server that doesn't implement nodeinfo, and never know that it's missing.

All that said, I think being part of "the Fediverse" means a lot of different things to different people. For some, "the fedi" is more about a particular set of shared values, and even the most fastidious implementations of specifications won't be enough to be part of the Fediverse.