Looks shady after seeing their FAQ stating a typo.
How to top up my balance?
You can up your balance on "ADD FOUNDS" window.
Another part that made the site scammy is the chatbox, you'll notice that most of the users have Bitcointalk profiles(mdayonliner,BADecker, etc) to trick new users.
Good thing that you've asked here because this thread can serve as a reference for the others so they won't get scammed in the future.
Edit : That smaq user who gave you the code is the owner of the site. 100%