From the About us page:
Our goal in launching NegativeSpace is to give photographers a platform whereby they can share their photography with the world. We want to provide those out-of-focus surroundings so the beautiful high-resolution images found within them have a chance to shine. NegativeSpace is about creating communities: A community of photographers who want to share their work. And a community of online visitors who want to use their beautiful, free high-resolution images without any restrictions.