Can you be a little clearer?
If you're referring to backlinking a social profile, post, or tweets then you don't have anything to worry about there. I mean, don't be stupid and just go buy a million chinese and russian backlinks (unless you're in China and russia), but you can rank YouTube videos with GSA and social signals.
If you want to SEO a social network though, make sure you hit it hard! Social networks are used to taking a beating, and buying a fiverr gig for 5,000 backlinks and 500 social signals is not going to do you any justice. You really need someone who knows what they're doing with GSA and can give you 100s of thousands of contextual links. And also blast it with shares at the same time. Even do a press release. It makes it look as though you're going viral. Thats the key to ranking with social networks.
I mean just think, what happens with authority profiles? They go viral.
What does going viral look like? SHares, likes, comments, social signals, and backlinks. And lots of em'!