Are you referring to the 10% PS4/XB1 code?
I tried the A50 once, but the one I got had a bad humming sound. I was going to get it replaced, but ended up going with the Skullcandy PLYR 1 (also made by Astro). I think it's weird that the PLYR 1 has a MUCH better stand than the A50s which I found...