A challenge for decentralized search and content distribution is the antagonistic relationship between search and content distribution, e.g. SEO manipulation. C

A challenge for decentralized search and content distribution is the antagonistic relationship between search and content distribution, e.g. SEO manipulation. Cooperation is difficult when interests diverge a lot, as they do between content providers and users with respect to search (users want to find the most relevant provider for their search, providers want their resource to be found for all searches, no matter how irrelevant). A decentralized search engine controlled by the users' interests must be hard for the content providers to "infiltrate" and control the results, or it's useless because as soon as it will become sufficiently popular to matter, intentional manipulation and spam will become popular.