The ‘walled garden’ tech giants dominate digital advertising and one prediction suggests just 17% of digital ad spend could be on the open internet by 2027. If this happens, online content diversity will fall, costs will increase and brand ROI will stagnate. Advertising as we know it, will be finished. The open web is what keeps the internet free, vibrant and full of quality content while supporting business growth. If ad spend continues to be syphoned into the tech giants, independent publishers will continue to suffer and the open web will close. Everybody loses.