As someone who loves photography, I'm deeply passionate about copyright remaining with the original artist. I guess I'm your target user.
The main thing that hit me about your current landing page is it's lack of vibrancy!
The photo apps/sites that do well (500px, Instagram) thrust beautiful images at you at every opportunity and it works!
While you aren't responsible for the quality of art stored in your accounts you are still trying to appeal to those that are attracted by great images and proving that others entrust their greatest works into this service.
Having some great photographers use your service that you could showcase,would speak volumes to other potential customers.
The main thing that hit me about your current landing page is it's lack of vibrancy!
The photo apps/sites that do well (500px, Instagram) thrust beautiful images at you at every opportunity and it works!
While you aren't responsible for the quality of art stored in your accounts you are still trying to appeal to those that are attracted by great images and proving that others entrust their greatest works into this service.
Having some great photographers use your service that you could showcase,would speak volumes to other potential customers.