The lack of current credit card support made me think that they should also be a reward similar to the autopay if your pay using voucher… With some condition of course…
If you have the at least the full amount of credit in your account for the upcoming invoice, you should be entitle to the same reward as the regular autopay reward.
Meany people would now accept to use voucher when the credit card is not working if they could get the same reward options.