Hire writers and have it publish to reputable public relations website or any news website. It's true that marketing really is bringing in the most for a project.
But, it doesn't have to be all marketing and you still have to balance things or still focused in the development of the project. It's like that you're all buzz but no good content if you'll focus in marketing.
divide in both them is the best option for the success. If you keep that in mind that marketing alone will give you success then it will not if you do not have beneficial product or if you do not complete the product for which you invite the people. Product alone also do not work in many cases. Your marketing just bring the people to see that what you have for them and after seeing that they decide to stay with you only if you have further potential to give them a great product or benefit.