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. https://blog.marketo.com/2018/12/how-to-spot-when-advertising-is-led-by-a-quadropoly.html
blog article
HOW TO SPOT WHEN ADVERTISING IS LED BY A QUADROPOLY
When you think of companies that dominate advertising, Google and Facebook are undoubtedly the first two names that come to mind. But this pair no longer reigns supreme: Amazon has established itself as the third member of this triopoly of advertisers. Though the triopoly has been going strong, it’s only a matter of time before it becomes a quadropoly. Hear me out. There might not be an emerging fourth player right this moment, and there might not necessarily be a competitor on the horizon in the next two years. But Google, Facebook, and Amazon aren’t untouchable. If history in this space shows us anything, it’s that disruption will only continue and at an increasingly rapid pace. READ MORE