I think before getting involved anything we need to analyse the things because we don't know which is fake and which will be legit so doing the proper Research and make it comfortable for you will be right so far that I appreciate you for putting this site.
I think you should not follow other people advice and do your own research. Also i would like OP to state the reason as why he want to do gambling on zombiewager ? What is special in it when there are so many other trusted sites available.
I am sure zombiewager might be offering some sort of bonus etc, as these new sites always do to attract the customers.