Marketplace
As per the title, Humbe Bundle is giving away the April 2014 and April 2015 issues of IGM - just put your email address in here: https://www.humblebundle.com/weekly and they'll send you the key (Humble Bundle account is probably required). Probably available until the weekly bundle expires. Enjoy!
Also, they have 2 awesome bundles at the moment - the Might and Magic Bundle is already looking great value and there are more games yet to be added.
Their weekly bundle includes Farsky for 1c or more - that games alone is well worth your hard earned 1c, although it's very hard to get started and there's no tutorial. Shark infested waters are not a safe place.