Prepaid in Sweden (I used Comviq) is get a simcard from 7-11 for ~$4CAD -> Download Prepaid App -> Choose either just data or phone and data package active for 30days from the date purchased in the app. There are data packages like $7CAD for 1GB Data, no phone calls or text messaging required to purchase (no base plan). You can get a combo package FastPris 95 for $15CAD which is 1GB Data and unlimited country wide calls. If you don't want to pay for anything you still keep your number and there is no required payment, you just choose if you want to activate something for 30days at any time.
My current situation with Koodo prepaid. I have to pay minimum $15CAD/month for a "base package" that has basic text and call. If I don't pay the fee, I lose my phone number in 90days and it goes to someone else. Bottom line I think it'd be great to get rid of the mandatory payment for prepaid. It's not a monthly plan, It should be a pay what you want to give you services that you want.