Is there any way to make factions without owners, that dont selfdisband when they are out of members?
Set a faction to permanent status, they'll never get disbanded, even if there's no members. "/f permanent <faction name>"
Yes, just make a faction, set it as permanent, then leave. As I say it will remain with even with no members
and also how to make so when user wants to join the faction he doesnt need the invitation from the owner of the faction?