[jka]

Even if customers pay for a service, isn't it likely that eventually the service will also want to sell their data anyway in order to increase margins?

[ceejayoz]

The potential reputation hit is harder to justify if you've got robust other income streams.

[jka]

Indeed, and that's certainly reassuring; the option may still gain traction over time though, even for the most forthright of businesses.

[chopin]

I wish that was the case. The number of third party trackers on web shops is sometimes infuriating.