>That said, the results indicate that the probability we are alone (<1) in the galaxy is significant, while the maximum number of contemporary civilizations might be as few as a thousand.
Err, what exactly were you expecting, their telephone numbers? You got figures and probabilities in the conclusion and I can't see what else you could reasonably hope for.
I (and I believe jwocky as well) expected some kind of rationale. There are no figures nor probabilities supporting the conclusion in the linked article.
Of course if one pirates the paper they can learn more.
>That said, the results indicate that the probability we are alone (<1) in the galaxy is significant, while the maximum number of contemporary civilizations might be as few as a thousand.
That's not very useful.
The full paper is available on scihub though.