depends really...Most accounts type of things generally give you say 21 days. I would say with a commission a week, more so for the silly people who go "add me to your commission list" then find out they have a bill or something and use the money for that instead of letting you know.

I'd start working on the others since i'm assuming they have paid. Wait say 5 days, let them know they have 5 days to notify you about payment. If they don't they obviously do not want it and remove them from your list. Or add to a list of possibles??