You have to put a javascript on your registration page and then you see all your new signups in a realtime dashboard with added social context, like the screenshot on the home page. You also get email alerts whenever someone who is really influential signs up.
There is also the option of calling a REST api to send us new signups.
How do you tell who is influential? How can you map email addresses to Twitter accounts, or other social media accounts? Most influential people don't really share it to the public.
Anyway, I know this site was just put up to garner demand, and you probably haven't implemented anything. If this really works, I'd be willing to pay say $30/month for it.
If you don't know any English then you don't code. How could you?? Every programmer I know does know some English and can write/speak well enough to be understood.