the transaction did in fact come from TF
Do you have any proof for this? Several people (and even the Eater) received coins from this source.
Yes.
The address that is holding 1,000
BTC, and that was giving away
BTC to users is 1BfxSuxJqXuizBbTcP238JZY9DT4eqvzJG
The above address received 1,010
BTC via 641b11014a25e305aa075cfd9505435c697602890cc4fb76f27bc7ba95a61a76 from 1Hy1rceh2EaKnAQhGZocTFUGnKFFD3mNG5
The above address received a similar amount of
BTC via 938e072318486566a9b8c301b9937052fc25f500ee4d0cea9f4dde07d9614b24 from 13tikBdmMVkyuykDVNmv3tTr8YkVN3Xrut
13tikBdmMVkyuykDVNmv3tTr8YkVN3Xrut is believed to belong to TradeFortress according to
this post by malevolent in 2013. I am not 100% certain on his thought process, however a brief look at blockchain transactions around this time makes this seem reasonable.
If you were to believe malevolent, then either TF sent you
BTC, or someone purchased ~$500,000 worth of
BTC from TF just to giveaway. I would personally doubt the later is what happened.