You falsely assume a new search engine can only be "as good as Google". Google's search has become highly commercialized over the years, it used to be about fin

You falsely assume a new search engine can only be "as good as Google". Google's search has become highly commercialized over the years, it used to be about finding the "best" answer to your search query (the "original" PageRank), but it has increasingly become the "best consumerist" answer to your query (where to buy something). This make it more susceptible to spammers, as their basic incentives are similar. New, different, search engines might try another approach, perhaps less personalized, less commercialized, and less mass-media oriented, and be less of a "petri dish" for spammers.