Customer input and access - make an add-on, feature, etc available for a specified time for a dollar. Good way to try new things and encourages feedback. If enough people try then you will know what would be appreciated in value packs. Win-Win!
I don't think this idea is feasible since the majority of add-ons now are roaming/long distance add-ons and those add-ons don't need to be really 'tried' as well Koodo would definitely end up losing money IMO