I knew it. As I said before in the dicebitco.in thread...."any site that accepts investments is a scam", and I'm right. No reputable gambling site will ever take investments. That shows they do not have enough bank roll.
Well, there was one, forgot its name... "just-something"... wasn't a scam as far as I know. I'm sure that if it were to come back to life it would be considered reputable.
But with that one exception I have to (reluctantly) agree with you. I had two close calls (lost only 0.02 BTC on DB and ~10 LTC on D.N) and I'm done investing or gambling on any such sites.