Try searching for something using their api, and compare with websearch. There is a world of difference between the search results. IIRC they aren't allowed to

Try searching for something using their api, and compare with websearch. There is a world of difference between the search results. IIRC they aren't allowed to share results from some of their other sources via their api, so you can get a good idea of how much they take from other sources and how much from their own index. But that is a non-issue as far as I'm concerned. As long as the results are relevant and they got them legally, then who cares where or how they came from?