This seems to be really really nice project. But promotion on Facebook is also one of the best ways to promote an object. Also you can use other social platforms for promotion also
Yeah this is very nice project. You have a good point that promotion in different social media makes attract many investor to invest in this project. I hope this SunContract will have a facebook campaign.
By performing a facebook campaign you can have many investors. There are now many users of facebook. By promoting this project in the facebook I know it will be a good way to make progress.