So no explanation then...
The site has switched to a new "provably fair" system, which the operator announced in
a new thread. Of course they never acknowledged that their old system was not provably fair.
Unfortunately the new system is also flawed, perhaps even more so than the previous one, as dooglus explains in another thread:
I checked your so-called provably fair system and it's kind of laughable. You use the txid of the "last bitcoin transaction".
As you can see, the hash of bitcoin transaction is totally unpredictable
The problem is that the hash of a bitcoin transaction is entirely predictable. I can pre-generate thousands of them and have them ready for broadcasting. Then I pick a bunch that make my ticket win and broadcast them at just the right time. If I was you, I could then pick one of them and claim that it was "the last bitcoin transaction". In other words your system isn't provably fair at all. It's exploitable by players, and cheatable by yourself.
I think you should rethink the system you use before making such a half-assed complaint against a better thought out game.