I'm pretty sure the program will never go away, in the forseable future. Correct me if I'm wrong but they just set expiry periods for the vouchers so you can't go hoarding them like you could in the good ol days. That means vouchers will expire at the end of the current period and can't be used in the next period, even if you got the voucher the day of the promotion expiry.
I found this out the hard way and lost $80 of vouchers.
E.g. If promotion ends 30th September and new promotion starts 1st of October. You receive a voucher on 25th of September, you must use voucher by 30th of september, otherwise it's invalid from 1st of October.
