User profiles — slices of our digital selves — are sold in large chunks, i .e. at least 10,000 in a batch. On the high end, they go for $0.005 per profile, according to advertising-industry sources. But maybe that's not the right way to value the data.
After all, online advertising "supported $300 billion in economic activity last year":
That's more than $1,200 per Internet user and much of the online advertising industry's success is predicated on the use of this kind of targeting data. If you're keeping score, this necessarily apples-to-oranges comparison yields a difference of 240,000 times between how much a user profile sells for and how much a user, herself, may be worth to the ecosystem. That's six orders of magnitude worth of confusion.