Early search engines were built on an unspoken transaction — a pact between search engines and website owners — you give us your data, and we’ll send you traffic. While Google changed the game of how search engines rank content, they honored the same pact in the beginning. Publishers, who owned their own content and traditionally were fueled by subscription revenue, operated differently. Over time, they built walls around their gardens to keep visitors in and, hopefully, keep them paying.
Over the past six years, Google has crossed this divide, building walls around their content and no longer linking out to the sources that content was originally built on.