Amazon Prime vs Gamers Club Unlocked

Amazon Prime has been my go-to for buying games but because of recent developments, Best Buy's Gamers Club Unlocked has looked a much more viable option for my needs. Buying via the PSN and XBL store has been the trend (especially if you live overseas where its harder to find storefronts that sell the latest games) and it does seem to be the future, but I still like buying the physical version. There is a couple of reasons for this preference:
Can sell and trade-in my games
Can carry down my games to my kids, nieces, nephews, etc.
I don't have to worry about a digital storefront going down or a publisher taking their game off the store.
Can easily carry my game to a friends house
A physical library with cases to browse and display

Now Amazon lately has only offered games to buy via digital code and you haven't been able to pre-order FIFA for example and getting the Prime discount for pre-ordering the physical version. Where GCU is still giving their pre-order discount AND coupling that with an additional $10 gift certificate. Not sure what's causing this issue with Amazon and why it seems to be more prevalent with popular franchises...but as long as it continues to be an issue, I will abandon Prime for my videogame needs.