About a week ago my deposit was stolen from my address within minutes of confirmation. I contacted support and also left a message here but I have not had any reply. It is possible that it was my side that was compromised I suppose, but I don't think it was. In any case it would be nice to get some kind of response, I guess that is looking increasingly unlikely.
I would strongly advise against depositing if anybody is reading this, at least for now.
I am sorry to hear that but I was able to move BTCs from and to my address without problems (except of course the limitations due to the empty hot wallet) so I believe it was your side which was compromised. Anyway, since there is no sign of the owners here of via mail, nor has the hot wallet been refilled in weeks, nor the leaderboards, broken for one month, have been repaired, I agree with your advice.
I myself will wait for signs of life for some more time before starting the usual fraud procedure.
I took out all of my BTC from the site a couple of months ago as I was not satisfied with the lack of 2FA on the site and the constant issues with user sessions and stability that were being uncovered. I said I'd re-deposit once the site was stable again after monitoring for a month and security was to my satisfaction. Right now, I'm glad that I have no stake in the site. (I'd never had any concern about the legitimacy of SD however - lets hope they are just on holiday)