Think most serious affiliate programs try to track down their affiliates with money in their account. It is money that will be paid out sooner or later and it just messes up the books to have them lying around in the system.
So on that note, please make sure you all have updated payment details in Betway.biz
If you can not find your preferred payment method among the options you can always contact your affiliate manager and most likely they can go around some “rules” and offer you another solution.