no panic dude, that address was collecting bitcoins from compromised bitstamp addresses for 24 h.
Maybe a typo then or just generosity, either way it says nothing about who the wallet's owner is.
well, we do know that stamp uses standard fees 0.0001 when moving coins.
here we have some transactions with 0.55, 1 BTC, 0.1 BTC fees.
You can't use standard fees when moving that many coins from that many addresses in one go