The new free system comes with a bit of a catch, of course. You'll start your free account with a set amount of music you can listen to, but as you do, it'll drain your "FreePlay tank." To refill the tank and regain access to MOG's massive library, you'll need to work for it. To do that, you'll need to play MOG's "game," which essentially means earning the right the listen to music by sharing music with friends, clicking through ads, reviewing songs and even making and sharing playlists.
MOG's new interface is a small, HTML5 website, which means it's quick loading and works on nearly any computer with an internet connection. MOG has software you can run if you like, but it also works in browser. But, like Spotify, freeloaders, regardless of the amount of music in their "tank," won't be able to use the service on mobile platforms.
Gamifying the free service isn't a half-bad idea -- the eternally lazy will certainly latch on to it and use it for all its worth and the rest of us will probably just end up subscribing at some point if we enjoy the service. Either way, it's another streaming service stepping up its game in the face of the recently launched Spotify, which is always a good thing. Give it a shot for yourself here.