Yeah, social media profiles are bought and sold like commodities daily. Look for "bots" in the news for examples.

That's different goods.

I mean identities that span across several networks and include emails, aged cookies, fake fingeprint generator, etc

We're talking about the same things.

From what I understand this is an actual thriving industry already. Traditional identity theft (get someone's SSN and other info and open credit lines in their name) is much harder now, so the fraudsters have moved on to creating wholly made up "synthetic identities" de novo.