Active promotions will help them to raise the money, but not the coin price, after crowd sales, they need to develop the things what they mentioned in the roadmap and it will help them to list the coin in higher volume exchanges. They need to develop the project, which will help them to attract more community members, and they will start supporting this project.
It is very important for cryptocurrency startup to fulfill everything that is written in roadmap. It will be more trust to the project if it will follow the roadmap.