Why are you saying you need require a benefit when you're getting a 20% already on any and all games branded as new, I haven't bought a used game because I could just buy it cheaper and new from BBY. Granted it sucks that you can't get 20% off the price matching but you're still getting 20% off on top of whatever game they have in stock even if it's on sale.
If you're the type of person to be waiting for price drops (for example Tomb Raider: Definitive in my scenario) in the long run it's comes up at a good discount.
Out of a 60 dollar game if the game is being sold for 40 dollars that week as a GCU member you're getting it for almost 50% off of retail price (31.99)
If you do that for 4 months out of the year the money you saved = the amount you paid for the current 2 year GCU membership.
I still think that 120 is too much for the subscription, I would say 60-80 would be a good price for a 2 year subscription but with the amount of money saved within those 2 years even if you only buy 4 or 5 games it's still a nice bang for your buck.
I am fine with them keeping it at at $120 if they officially and automatically allow for PM plus GCU discount. As it stands, I agree, it shouldn't be more than $60 to $80.
I agree with this, and it is a YMMV because sometimes they will do both, sometimes they wont (in my experience, anyways). But having said that, I have already gotten enough value in the few short months I've been GCU to fully warrant the cost, even at $120. Granted I paid $30, and will look to pay $60 to reup later, but breaking it down it is worth it at $120 if you do it right.
So far I have had 100%(4/4) success this year with Customer Care for Elite Plus sending me a gift card for the 20% difference when PMing online purchases. It isn't a true PM plus 20% but I will absolutely take it and I am super satisfied by it. I have had 0%(2/2) success with in store purchases so from now on I only do shipped or in store pickup online orders for games.