"An Amazon mobile ad network, launched late last year, is now blasting ads via apps on smartphones and tablets, including Apple Inc iPhones and devices powered by Google Inc's Android operating system."
"For Amazon, an ad business is a new revenue stream with fatter margins than its retail operations. To Google, Facebook Inc and other online ad leaders, Amazon is a threat because it has data they lack."
"Google knows what people are searching for. Facebook knows what people like and who their friends are. Amazon knows you searched last week for running shoes, but also that you bought a pair a year ago. That kind of information has advertisers salivating."