Do you use decentralised accounts or some exotic services?

I just got back into the decentralised web thing (more because of curiosity than because of privacy issues).

I have a Matrix and a Mastodon account both on my private instances. I also use Keybase which is not decentralised, but a very interesting concept.

So where do you hang out online when not on Hashnode or the centralised stuff like Facebook, Twitter, and so on?