You should read the rest - it's a good article. You are right about that point , and more broadly i m not convinced that advertisers can justify their spending

You should read the rest - it's a good article. You are right about that point , and more broadly i m not convinced that advertisers can justify their spending and their bids well. Advertising seems to be a constant for businesses - they will spend those money to marketing regardless. And ads are effective to a degree - but i have yet to see a rigorous study of the correlation between amount spent or bids to ROI. Judging from the iffy nature of advertising statistics and google's "invalid traffic" alchemies, i believe google is also selling large amounts of bullshit along with their basic ad product. It's bizzare that an industry that is so valuable seems to be operating in a rather thick haze.