Most affiliate programs tied to sports betting have negative carry over. It can work one of two ways, if you make $300 in lets say January, and it is below the minimum payout, and your players win in February and your affiliate share loss of their winnings is a -$200, your balance going into March will either be $100 or it will be $300, but you have a $200 makeup to the affiliate program before your total will increase again.
In the same situation, if your January $300 was above an affiliate programs minimum payout and they paid you, after a -$200 in February, going into March your total would be either a -$200 or you would have to make up $200 to the affiliate program before it increased above $0.
I’m not sure which way Bodog in particular works, but I would imagine they use one of the above ways of negative carry over. I would also agree with Stupid, Bodog has very good retention.