If nothing else, this post is kind of conflating 2 different things: (a) do search rankings display a bias, and (b) is a "revolving door" and close relationships leading tech companies to deliberately induce such bias. I think it's important to distinguish them, because I think (a) is obviously true, and (b) is probably mostly false. Managing bias is a wildly difficult thing to do, especially with something as complex and correlated with everything as politics. There is no such thing as an "unbiased" ranking, just like there's no such thing as "unbiased" journalism.