If you think that any other coins is good for a gambling site, think twice about that.
I have many site having other coins than bitcoin. Justdice is a perfect example of the site of what i am talking about. The site used to be running on btc but since past few years clam is the only coin the site is running on.
Yes, I do know that.
However, see what happened to just-dice. They were once the biggest gambling site out there (maybe second after primedice), but after they changed to CLAMs (for good reasons), the site has declined in volume and popularity.
Also, the just-dice situation was very different from this website. They needed to change because the bankroll became too big. The quoted user just posted random coins that no one ever heard from, and in which he probably has invested himself.