Exactly! They will add more coins/tokens after the exchange goes live officially in late July 2019. Of course they can't be a one-token exchange platform so we expect lots more token in addition soon.
Thats right. Its an MVP of the project. I guess the team was going to use that to show what the exchange was going to be. More tokens would be added and a lot more features added to bring in volume.
Then this will be a huge announcement to make, another coins/token will be added to BCNEX and other people also use these kind of coins/token. Another marketing strategy from Bcnex has made!