It sounds like it would be appealing to someone, but to be honest I don't think I'd use it. Personally, I'd rather take the time to find charities myself that p

It sounds like it would be appealing to someone, but to be honest I don't think I'd use it. Personally, I'd rather take the time to find charities myself that promote causes I believe in and wouldn't spam me unnecessarily. But maybe charities like that are incredibly rare and I'd just end up using your site instead.