When you already follow a company on Twitter, the "Follow Us" button of that company will automatically turn grey, regardless of the domain. So, how can you determine if User-X is following companies A, B, and/or C based on their Twitter handles?
The same concept applies to Facebook "Likes."
I am particularly interested in finding out if there is a way to accomplish this without requiring users to provide oAuth permissions, such as through connecting with Facebook.
Thank you for your help!