The value and impact on commercialized surveillance depend critically on the ability to generate large databases, both on the any specific indivual, and on the the number of individuals thus affected. Breaking up dataminers probably would help.

And if we take a step back: this isn't necessarily only about privacy, but about capitalism and competition. Data-miner customers, and data-miner subjects might both get a better deal if there were competition between the middle men, at least more than now.