Ok , heres the answer im sure . Looks like boosters only get removed if you are without a base plan for 90 days
Do top-ups expire?
We try to keep things simple by erasing the need to track too many dates. It's a hassle. So Koodo top-ups do not expire.
Do keep in mind though that if you’ve are without a base plan for 90 days, your account will be deactivated and you’ll lose your phone number and any funds remaining on your account balance, including your boosters.