Referencing DiceSites as you did, SafeDice currently has a historical Profit/EV ratio of 38%
As an investor, you gotta know what you're looking for. Sites taking risks up to 10% of their bankroll for a single bet?
CG has other standards and mainly focuses on bankroll stability and security.
Letting investors risk 10 times Kelly is really stupid. Fortunately they changed that and now the average is "only" about 5.35 (only old accounts can set a kelly higher than 2). It sucks because as an investor you are diluted if you take a more reasonable risk level (2x Kelly is fine considering most of the wagered volume is in small bets).
About profit/EV, that's quite irrelevant, long term it will be 100%. Even though ideally you'd like players to make infinite small bets, and therefore having steady profits, you can't choose that, and it's good for the casino to let players make big bets. It's good as long as the casino can stand losing those bets (which obviously isn't the case for those investors that are leveraged 10:1). The variable edge feature there is quite interesting, as it lets players make very big bets (in relation to the bankroll) but by charging a very high edge, which makes it still sustainable for the casino.
How is the max payout set at Crypto-Games, is it 1 Kelly?
I appreciate that your threads are very active, that's one of the reasons why I have so far invested more in your casino than in Safe Dice, even though the expected returns seems much higher there.