They already have most of the market though. What will advertising really do for them, considering that anyone who will even remotely be interested in this game has already heard of it. The population of people who would be willing to play star citizen has to be smaller than the number of people interested in something like red dead or GTA, the original pitch focused on the fact that this game is niche enough to not attract AAA studios.

Who will they advertise to, they've attracted enough attention that any potential players have already heard of this project?