Tips for Efficiently Extracting Contact Info from Github Stargazers & Maximizing Your Credits

I'm working to pull Contact Linkedin URLs & work email information for Github stargazers. It's proving pretty difficult to get info for more than just a fraction of the contacts; I assume primarily due to how limited domain and name info is from Github. And I'm burning through credits at a crazy pace as a result of trying to get at as much info as I can get. Any advice on how I can get at more of this data in an efficient way so I don't lose all my credits with experimenting? Or anything obvious I'm missing/not doing?