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.