Primedice would be best if they accepted investors
They prefer keeping 100% of the profit for themselves and have a big enough bankroll to offer a max profit of 40 BTC per roll.
it's 20 BTC now that is also not bad
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
PD decreased max profit after some guy won 2000 BTC
That's the advantage of sites with crowd funded bankroll, they can offer higher max profit, if someone wins big - the investors get hit. PRC has max profit of ~135 BTC and it keeps growing.
It's good for investors as it attracts big players, and if they want to reduce the risk, they can choose low kelly option (1/4 or 1/2).