Hi everyone,
For your information we have upgraded the Janrain Login Plugin for nopCommerce 2.50, 2.65, 2.70 & 2.80 - http://store.novasoftware.com/products/plugins/janrain-login.
Janrain Login Plugin is an ExternalAuth plugin which can contain many social providers. So most customers don't need to register and login with social providers the plugin will can automatically register an account on your website.
For more information about this plugin please read this blog post - http://store.novasoftware.com/blog/5/janrain-login-makes-users-login-and-register-on-your-nopcommerce-site-more-easily.
For more information about the Janrain Engage from its official site.
If you need any customzations or any other services, you can access our company's nopCommerce developer page for your reference.
Best Regards!