There had been quite a number of Vulnerabilities in gambling websites since 2011 from satoshi dice to primedice and a lot more.

What was the total number of exploits and which ones were the lethal ones, I think that hufflepuff guy on primedice did the most damage.
The exploit was called something like "Race time condition" and I read something similar in my CS class but it was related to a banking system so it could be different.

Basically, it was giving multiple inputs to the system trying to get some response from the system in 2 places, and then exploiting the system.

Also, Is there any list for me to check regarding exploits? I'm thinking about developing something so it may come handy.
[There are vulnerabilities in each market and we should look for one or more alternative options. Recently, I came across a Mallconomy, a great earning site. If interested you can comment.]