It's a bug that you could rank highly in Google without buying ads
I shouldn't have mentioned ads here. Position on the results page should only depend on the quality of your content; if your site has the best content on the Internet for the user's search terms, you should be the top result. You shouldn't be able to change your position in the organic results any other way, like by exploiting bugs in Google's ranking algorithm. The specifics of the ranking algorithm may change, but if your site is the best, you won't have to worry about it.