Dominque,
I am not saying that.
What I am trying to say and it probably came out wrong, is that in some cases a player may refer another player outside the affiliate program and these players are credited (nothing to do with the affiliate program).
Also let’s say a player has a friend who mentioned BingoKnights and he/she surfed the web and came across your website and clicked on your link to BingoKnights (hence you the affiliate get the credit for this player), but he/she may want to also mention their friends name in Bingo as this helps out the chat host and the player will get a small bonus for as well for referring the player.
Hope this clears it up.