[GianFabien]

It's all about advertising revenues.

Advertising was invented for classified ad buyers by newspapers. It has since adapted to each new medium that came along, radio, TV, signboards, etc and now all manner of internet properties.

With technical searches, carefully crafted search terms can locate useful information. However, I find that once I venture into more general realms, the majority of the results, no matter how detailed the search terms, are ads or content with masses of affiliate links, etc. That is, very low grade ore (information), effectively useless for knowledge building purposes.