Orkut is dead a long time ago but it was not always this cesspool of spam, chain letters and filth. Once upon a time it was a cool project.....
In the best of my recollection, once upon a time, in 2004, Orkut (the site) was nothing but a 20% project of some Orkut Buyukkokten dude on Google. It had a simple goal: to connect Orkut (the dude) with his close friend and to map the whole six degrees of separation thing. In an era of the web development when breadcrumbs where not in vogue Orkut (the site) had it, even two: one with the degrees of separation between you and whoever profile you were viewing (through your common friends network) and the other with the degrees of separation between you and Orkut (the dude).
And in the very beginning it worked because it was invite only and that made the invitees to be more or less part of the same socioeconomic and cultural background (even among countries). Orkut (the dude) invited his pals on Google Campus and on Stanford. Some Stanford dude invited some Brazilian dude on a federal university (UFRGS), who invited his pals on campus, who invited some pals on other federal universities (UTMG, UFV, UFRJ) and, in the invite only degrees of separation phase, everything was good and beautiful.
Everybody knew everybody else, connections were forged, Adam Rifkin gamed the system, some robot put people in jail, baby animals got lasers and everybody partied hard.
The it died, the cool kids moved away either to Facebook or completely away from public social networks. Now get off my lawn!