This is not solely my idea others have proposed the idea or would like to see this or something similar happen. Me personally I would like to see some kind of redemption for single cards and maxed out cards in the form of tokens that can be cashed in for prizes, tournament entries with some kind of decent payout guaranteed just for entering things like that. Along that line have a baseline value for reward cards, then a bonus for betas, then a greater bonus on that number for alphas as well. Along with a bigger bonus for rares/epics/legends and golds as well. Creating scarcity and adding value with some level of backing of the upside of an exchange would be huge in many ways and I think is something too good for the game to pass up, at least in my opinion for sure.