May e you should explain how it works or indeed how you would give credits ? I know nothing about this !
When you choose match play mode, you can choose from 3 options, practice, scored or challenge. Challenge mode is for credits, ranging from 100 to 4000 per match (if memory serves). The player who sets up the match has to choose the amount and the other player either agrees to it or not.
All this talk got me hungry for it again, so if anyone fancies a go, hit me up with a FR and a PM 😉