If you're an existing Gamefly customer you can get a free month right now by
simply starting the process to cancel your account. It used to be that they
would give you half off the next month when you wanted to cancel, but now
it seems you get a whole month now. Note that this may or may not work for
those that got the free month via the referral. You don't have to go all the
way through the cancellation process to get the offer, if they are going to
offer you something it will be after you click cancel from the manage
subscription page.
Link: http://www.gamefly.com/