I, Patricia BT, own the fedi.is domain name.
I run a Friendica instance on the root domain name (apex domain), fedi.is, so I can host my Fediverse activity with several accounts and own my data. It runs the ActivityPub protocol so you can follow my accounts from any Fediverse account you have (on Mastodon, Pixelfed, etc).
I also plan to blog about the Fediverse, on the www.fedi.is domain, on a WordPress site, and gather some Fediverse news.
List of accounts:
@patriciabt@fedi.is = my personal account, I share from my other accounts, related to my blog on patriciabt.com
@interactionsite@fedi.is = SOON, Fediverse account related to the Interaction.Site website
@wpmondo@fedi.is = SOON, Fediverse account related to the WPMondo.com website
etc