I just want to make sure that there was a limit to this insanity. You can only cash in on this deal once, right? I bought Fallout 1 and then got 2 for free, so I can't go and do the same for Freespace and Descent, right?

You only get a coupon after your first purchase, of which there can be only one.

I figured. I was secretly hoping the rules were referring to the first purchase of every BOGO pair. Still a great deal. Thanks!