At the moment the primary driver is to get followers and link backs to the site, as well as pins of course! One method I tried recently was from a stoner on youtube... And no, I'm not insulting him, he's a self professed marketing stoner of some sort, ha! But he had suggested that one method to gain friends is to search within your niche, find out whose following those boards \ users, and begin to follow them. From there you're supposed to gain followers, and so the snowball continues.
For me? Not so much! So either way hopefully this isn't mimicking the other Pinterest threads, but I would love to just invest time and even a little money into utilizing what that site really has to offer. As always, thanks in advance!