I'd hazard a guess than non-contracted players are only paid in weeks where they play. I'm pretty sure that they're the category of player where you only have to give their club seven days notice and no fee before you can sign them. Most of our core players do tend to be contracted I think, but the players who were seen as risks, and who were probably in a weaker bargaining position than the club are the ones likely to be on non-contract terms, so probably JJ, Mickey Stones, Millson, Ward, Deane and perhaps Dudfield given the informality of his arrangement with us.
But that might all be gubbins.