Social Media Marketing: Social login or traditional website registration? Janrain, a social Web user management platform provider, recently released its Social Identity study with the research conducted by Blue Research. The study involved a final sample size of 616, with respondents recruited by email and screened to ensure they either purchased a product online within the past 30 days, or read articles or watched video from major media outlets in the past 30 days. A key element of the survey was finding out how respondents felt about using a social login — Facebook, LinkedIn, Twitter, etc. — instead of having to register individually at multiple websites.