The guy who stole the hashes is not the sites dev. He doesn't work for the sites. He simply was put on teamviewer to fix some things with the server because he knows the game code very well and he screenshotted the master seed. They are simply attempting to strong arm a payment out if us. If it was a legit win, they would have been paid. It's fraud. Nothing more.
The fact there is real proof of you having the game hash's before you placed the winning bets should make the wins null and void in my own opinion regardless if you used the information or not. You were given an inside edge.
Yep, that pretty much sums it up. Plus StackGambler's answer to Quicksy's question earlier. I don't know if StackGambler actively solicited those hashes, but even if he received them "accidentally" or whatever the excuse was - the right thing to do would be to inform the site's admin and not continue playing.
A gambling site where the "dev" hands out seeds is not to be trusted either.