Things to note:
A. This deal sounds like garbage, but these days you never know.
B. Your topic title is COMPLETELY misleading. It should say trade in 4, get 1 new release free.
C. According to that GameFAQ's post (*gag*), there ARE exclusions, those being sports titles.
D. According to that GameFAQ's post (*choke*), the trade-ins must be this gen.
E. I hate referring to GameFAQ's message boards for ANYTHING. Those "people" are a bunch of idiot 5 year olds.
F. Lastly, and most importantly, can anyone confirm? It would be good to head over to Gamestop and cash in on the buy 2 used, get 1 free deal for this if it is indeed true.