[quote name='greyzieoriental']So I just did Gamefly and got almost instant credit(like 5 mins).
To anyone who has done it already:
how long do I have to keep the service for?
Do I have to become a paying member, after the 30 day trial, to keep my credit from being reversed?[/QUOTE]
I'm not positive, but I don't remember keeping the service after the trial. My credit was never revoked.
I say cancel on the second to last day of the trial (since it can be done online). Unless, somebody comes in and specifically mentions their credit was revoked for doing this. Pretty sure they aren't though.