That's not their only address. Am I right?
Naturally, this is not their unique address and it means nothing. They can create thousands of other addresses. We will not know anything about them.
Most likely, this address is a scam, so that users think that the site is alive, that there are some movements and so that users make deposits.
Let me remind you that the last payment from this wallet was made 1 month ago. This is death for this wallet and the site itself. They will then take the funds from this wallet, do not worry about them.