[thethethethe]

Again, it seems unlikely that millions of people running businesses are that stupid.

[kjkjadksj]

It seems even more unlikely that millions of business owners would be sufficiently knowledgable in statistics to even test these things.

[agentgumshoe]

Remember, we're talking 'targeted advertising' here, where I imagine it is not easy for general business owners to understand whether it is more, or even as effective as 'traditional' advertising.

Easy money for advertisers just by showing some fancy irrelevant graphs.