I'd like to suggest that if several people in the same household use PM that they can add the lines together into one account to make it one payment instead of several. Then have a multi-line reward to offset the loss of the $2/m automatic payment for each additional line added. I'd also like to suggest that if multiple lines are on the same account that possibly plan data could be shared, or at least addons could be shared. Thanks for your consideration.
For context, some people might not join just because they will end up with more bills. For instance, my parents use Telus right now for everything just because it's all on one bill. Phone, internet, TV, 2xmobile plans. It's going to be hard enough to convince them to switch to PM for their phones to save money with them then paying for Telus bill and 2x PM bills. Also it would be even more likely for multiple people in the same household to join if they get even more of a bonus than the $2/m for autopay each.