It is their first month here, Primedice around for a whole year.
Pocket Rockets Casino ended their campaigns in less than a month.
I've only been able to get on to PD3 reliably since yesterday.
I've been collecting stats from the 3 dice sites.
Over the last 1.5 days or so:
dicebitco.in - 1968 BTC wagered in 1.4 million bets
Mon Aug 11 13:52:22 PDT 2014 invested: 2,408.52554118 wagered: 3,361.8603 profit: 0.7158 bets: 5,108,202
Tue Aug 12 22:36:18 PDT 2014 invested: 2,931.82386358 wagered: 5,329.5381 profit: -19.9860 bets: 6,697,934
primedice - 460 BTC wagered in 10 million bets
Mon Aug 11 13:58:40 PDT 2014 BTC WAGERED: 408,500.0259 TOTAL BETS: 753,905,073
Tue Aug 12 22:35:56 PDT 2014 BTC WAGERED: 408,960.4561 TOTAL BETS: 763,373,086
prcdice - 13 BTC wagered in 100k bets
Mon Aug 11 13:52:10 PDT 2014 Total Bets:5,099,004 Total Wagered:13,951.23978786 Total Profit:13.89963657 Total Invested:588.52328683
Tue Aug 12 22:35:41 PDT 2014 Total Bets:5,197,263 Total Wagered:13,964.67542004 Total Profit:13.12772162 Total Invested:577.17902080
This is immediately after the PD3 launch, so you would expect their traffic to be spiking at the moment, and dicebitco.in still did more than 4 times their volume over the same period.
PRC in comparison did no volume, and so it's no surprise they're having to stop their campaign.