I found from these two pieces of information
ref and
ref that halleybtc, halleychina and zueshash have joined forces to make this investment scheme.
Probably meaning that HalleyBtc has only got a short life left as they'll probably scam with the other two companies in the new attempt.
If they aren't considering scamming on their site, then oxbtc.com has three companies that control it, meaning it will likely scam anyway as it just takes one of hose companies to withdraw their funds for there to be a problem.