Most good games get advertised…
HINT . HINT .
advertisement on Youtube and Facebook ( not only in usa ) .
343i if you want people to buy this game then you might as well advertise it , im sure not everyone knows about the game . Its also a good time to let other people know about this website …
I hope 343i read this 
and i hope they consider it
Advertisement is not nessaceray a gamer will always know what is coming out and what will be good. True halo fans probably already have it pre order and/or dated on there calendar or some other place. But advertisement does work for people that are newer to halo. If 343i wants to bring new people into halo then yes more ads need to be used. But not ads on tv. Ads on 1) the xbox dashboard 2) famous social sites (facebook, myspace, twitter, youtube, etc) 3) Gaming stores.
Also this website needs to be advertised but limited because they should not waste money on advertising a website when you can find it on google. If they do advertise it. Do it on the Bungie forums becuase some people there do not know of any other halo forums.