Free gold

You can get 1 gram free at http://www.bullionvault.com thats about USD20 in value…

As far as I can tell it is a pretty cost effective way of buying and owning real gold bullion. Heard about it on CNBC so presumably legit ? trades are fairly cheap too…

My only concern is the total daily volume, I mean if the price starts dropping is there enough people online trading to purchase !?