I already donated a lot of money to https://thewaterproject.org/donate-bitcoin and what I like about their service is that they are accepting 4 other Alt coins for donations too. 
I got some FREE fork coins after the Bitcoin fork and I donated a lot of the BCash that I received to their water projects.
I see your site wants you to login with Social media accounts and that might be an option that some people would want to avoid. Staying anonymous, helps people to prevent situations where information about them might get into the wrong hands and that they might get bombarded with fake sites that wants "donations" for fake projects.
I got some FREE fork coins after the Bitcoin fork and I donated a lot of the BCash that I received to their water projects. I see your site wants you to login with Social media accounts and that might be an option that some people would want to avoid. Staying anonymous, helps people to prevent situations where information about them might get into the wrong hands and that they might get bombarded with fake sites that wants "donations" for fake projects.