20180525/DuckDuckGo you are the product
20180525/https://lifehacker.com/5697167/if-youre-not-paying-for-it-youre-the-product
20180525/https://www.quora.com/Who-originally-suggested-that-if-youre-not-paying-for-the-product-you-are-the-product
20180525/https://www.marketwatch.com/story/facebook-rejects-you-are-the-product-theory-but-its-explanation-confounds-privacy-experts-2018-04-24