And I can't see also the contact link for this exchange.
The dev should include that in his homepage as it is one of the important info for the site.
Probably they are working on this, today I can see few new items on home page including "About US", I believe there you can expect their contact information.
Another interesting one is "Suggest Coin", we are all got practiced to vote for a coin, but I believe this is first time, an exchange wants to listen community's opinion. I believe yo-ex will take our cryptocurrency exchange experience into another new level. Good work yo-ex, keep innovating !