I think that Koodo customers who have positive tab balances should have the ability to put this towards paying their monthly phone bill. Since some people like bringing over their own phones, or don't feel like buying a new phone, these people should have the freedom to put their positive tab balance towards paying their phone bill. Also, some customers just disconnect their service once their tab and phone has been paid off, and the positive tab balance ends up going to waste. Instead of letting this happen, these customers should also have the freedom to put their positive tab balance towards paying off their last phone bill should they ever disconnect.
Fido has a very similar program with positive tab balances (Fido Dollars) which lets the customer earn 4% in Fido Dollars each month, with the freedom of using these dollar rewards in any way they want, which includes putting it towards their monthly phone bill, or saving up for a new phone if they wish.