[gf000]

I don't know, I don't think it helps all that much when you are up against Facebook's, and Google's wits on how to circumvent it.

If they can open a port and side-step the security system of Android wholesale, they can probably find a "solution" to the not even that hard of a problem of doing tracking server-side.

[swiftcoder]

There is a problem in convincing everyone on the internet to install a server-side tracking component.

Pretty much everyone was willing to give this away for free on the client side, in return for limited social integration, or (in Google's case) free analytics - server side is a significantly harder sell in many companies, and there is a much richer variety of backend languages/frameworks you have to integrate with.