It's worth bearing in mind that any mag you consume on Readly, only gets a fraction of the tiny fee you pay to be a member. For something like MB, this is going to be a very tiny amount of pennies.
Realistically, for a small subscription mag, if you want it to survive, get a subscription. Better still, ask someone to get a subscription for you as a present for birthdays/fathers day/Christmas. It's a cheap gift for them, and will be remembered by you, for the whole year. Beats socks, or a novelty tie.