Great! As a follow up question, for example I want to let a friend use my hubzilla server to host their hub. Can I “allow” them to bring their own domain name and let them use it?

Edit to add one more question: Is there a restriction on what top level domain can be used for what purpose (fedi, email, website) or anything goes?

Would you recommend WordPress as a hosting service? I’m not able to understand the structure of it all to figure out if it:'s ethical and what with the recent fights with WP Engine and stuff, I’m unsure how it all actually works.