I just activated a new prepaid plan. I want the cheapest one and so opted for $15. Automatic top-up seems to make sense. Why was I offered the possibility of topping up for only $5 per month? If I don't want to worry about "manually" adding money to my account regularly, I have to choose an automatic top up of $15, right?
I found the option to automatically top up for less than the cheapest prepaid plan confusing. I can't think of a scenario where that is what somebody would want.