Word is, and I can't say for sure either way, is that they will start including games in Total Access stores. This means when you get a movie from the online store, you can return it to the store and get a game. At this time, it's only good on movies.
Now, there is a bit of conflicting reports with this. Also, it's supposed to start this week, so not all the info is everywhere it should be. I would suggest keeping an eye on this, though. It would be a cheaper (and/or more effecient) way to get nearly unlimited games for a month.