According to the rep, as soon as 6 players register. Only need two more at this current moment...
Only 2 registered players now, seems that some previous players decided to cancel because they cant wait too long. This kind of tournament that start when there are x number of registered players is not very good because first registered players want to start as soon as they register but they will need to wait for unlimited time till there is enough players to start. So they should keep an eye on the lobby to see the progress of the registration, if they have been waiting for a while but no other players joined so they will unreg.