There is a Korean exchange whose airdrop campaigns MemberPass is working on. I think they have a great model with transaction fee mining. I believe this type of exchanges will be around.
My question is where do the quality traders hang out? What motivates you to join a new exchange?
What takes me to join new exchange are the tokens that be listed and where I have invested on that ICO. I usually don't do trading on new exchange but if the token I have should be traded in that new platform then so be it.