I just noticed an error with this question. The second part is still valid as Greggy83 has also requested.
However, with the first part I suppose I was trying to simplify this down to two players where it doesn't work (they would both receive and lose nothing as the game would come down to the CPU). What I'm more after is clarity that if (and at the extreme) one person won but everyone else (say 5 players) left at the same time, the winner would receive 1st, while all others would receive equal 6th. Would this then give the winner a great ranking score or a minimum ranking score?