Why mastercoiners need centralized exchange?
1. Most users just use centralized exchange  platforms to do buy&sell, then withdraw their money back, they do not care about msc, even btc, they only care about how much profit.they can make.
2. Currently, users who wanna use msc have to buy btc firstly, then withdraw them to btc-qt or blockchain.info, then use their private key to buy msc, oh god, I can't imagine my mom could do this by herself.
3. 5 million transitions per second is unreachable when trading on Dex.