It's ironic that HN can simultaneously abhor[1] and applaud[this] progressive invasions of privacy on the internet.
The one underhandedly fills in information that the user hasn't explicitly given a site. That's abhorrent.
Another offers a solution for incorporating multiple analytics services into a website a sane way. That's worthy of applause.
They are completely different products/services serving completely different needs.
I.E. this type of person that is my potential customer doesn't convert on my landing page.
Personal targeting is a TOTALLY different thing. It's not about optimizing technology, it's about optimizing sales WITHOUT optimizing technology.
Remember: it's one thing when it affects you as a user. It's another thing when it affects your users.
It just depends on which hat you're wearing.