> Also, I work in this field and I will just say that people _do_ behave differently based on traffic source: i.e. users coming from Facebook behave alike, but different than traffic from Reddit who act similarly to each other.
Out of curiosity, what is your hypothesis for explaining this difference in behavior? Would you say it's primarily due to differing contexts in which a link is posted, or differing populations on each platform? Or maybe these both contribute about equally?
Stated another way: would you expect the same individual to behave differently coming from Facebook versus coming from reddit, if they happen to be a user of both?