Google wants to plaster ads on everything, and Google controls the primary search engine of the web. So, eventually, it is inevitable that Google will serve up nothing but ads.
Take a look at what you get when you do a blog search for “shower gel“. Listing after listing is a fake blog about a shower gel products, with links to shower gel product pages of online stores. Plus a few blog posts about ads for shower gel products.
Oh, and look at all the embedded AdSense.