Well I just checked satoshidice:
3613.54081797 BTC liquid cash = 1.3 MILLION $
They can run away with it any second now, yet they havent in the past 3 years (and back in 2013 that was worth much more).
So I think that is just paranoia, I think Satoshidice is very safe, and trustworthy.
Chances are will they? No they are running profitable... so they do not want to ruin that. It is a true money making venture.
I like a little more regulation then what gambling sites provide. But not everyone wants that so it all depends on your risk your willing to do on investments.