@sethlinson, welcome to PM. Generally, like other providers, when you sign up on a promo plan, the promo feature is not removed from your account when the promo deal ends. That would generally create a lot of outrage from customers, and I'm sure many calls and emails to CRTC would happen as well, in the sense that a provider is enticing new customers based on short term promos that consumers are not aware of. That would be really bad.
Generally the deal you obtained won't change unless you change your plan, or if PM decides to expire the promo for all customers (which they would most likely not do). I personally have never seen or heard of a company that would do that, but I do know companies like Rogers for example back in the day used to try and force customers to change their grandfathered plans whenever they went to do a hardware upgrade. Not sure if they still do that anymore though.
Anyways, you have nothing to worry about. I'm on the same plan as you, hopefully that makes you feel a little better, lol.
