Most emails take time to verify. Many users are claiming invalid amounts and there are also many fake emails from users that did not even have accounts.
All messages will get a reply. It takes time and this forum limits the speed of sending PMs.
I was one of the first to reply. I send my email on May 30th and my PM on May 31st. I have seen many many users who have sent messages after me that are getting refunded while I am not. I deposited 1.36 btc to btc-arbs and watched it grow to 1.80. I withdrew less than 0.05 btc when everything was falling to shit. I am asking for 1.25 btc to be refunded to the following address: 1PshALPGVCjWYBbbtXzhMKZFE2cwVbSTSC
I sent my e-mail on May 30th as well. Follow-up PM on June 1st. I had about 10 BTC deposited, so he has a lot of ground to cover. It's clear that he's not trying to pay back most of us mid-large investors yet. Freejack appears to be the only one of us who started to receive something.