As I've said already, any CMC listed exchange is good enough for now. If shard will get delisted (get inactive status) from CMC it will be very hard to get it back, trust me, they will remove you from their search engine also. CMC will treat Shard like a new coin and you will need to be listed on at least 2 exchanges that are active on CMC to get you back on. Looking to the team involvement with new exchanges, is hard to believe that this will ever happen after Shard gets delisted. I am not trying to spread FUD, but trying to help. Peace!