Wow, I'm surprised by the sophistication of this scam. Just incredible. It reminds me of the Sharexcoin scam where the scammer coded an entire exchange only to later run off with everyone's coins.
Also, I guess this thread is further proof that open source is the way to go (although I guess since it's a PHP script, it's open source by default).
With some tweaking, wouldn't it be possible to completely remove the backdoor and turn this into a legit dice script? The scammer already did most of the work and judging by the screenshots, it seems they did quite a good job (minus the scam bit of course). Just add a front end and voila! I have some experience in Python and Java and I know PHP isn't too different from Java so I think I could do it if there is enough interest. I think there would be a lot of demand for something like this. Perhaps the community could make something good out of this.