Really 999dice.com is a scam from when.
Hey tomatocage, You put 999dice in the top of the list! I know you are a logical man! Can you explain how exactly is it a scam? Asking because I have seen players making 20 BTC from 0.05 and 1+ BTC from 0.0002! Thank you!
There is a pretty convincing scam accusation against 999dice which you can find here:
https://bt.irlbtc.com/view/948965.0Also, some more sites to the list:
Terabox.me
Lunaminer.com
GenerateBTC.com
I don't think thats convincing! Read dooglus' reply! He said they could possibly scam by that method! But you can always make it on your side by not betting in the same pattern

True, they could possibly scam by that method, but it seems pretty suspicious.
For example, why the need to press a button every time you want to verify the seed? Also, 999dice has since changed their system.... And replaced it with another flawed one. (See this thread:
https://bt.irlbtc.com/view/971447)
They could easily look at another dice sites provably fair system (like just-dice) and copy their transparent system.
I'm not accusing 999dice of anything, like you said, they might not be scamming at all, but it is fishy.