I prefer Facebook as in that site, and they have large members from all country and Facebook now become a big social media industry. But besides Facebook, maybe you can take a look at Instagram as I see they have a chance to be the next bigger social media industry like Facebook. I am sure that with a big members community of that social media, you can attract more customer and of course, more investor to invest in the projects. You must think out of the box and don't use the usual media like another project if you want your project to reach more audience, so they want to know more about your project.