Lost Agency: although during the rollout period big sites may go first to be able to timely detect spam issues, RDFa allows everyone to provide this kind of data no matter your size, and even make your own ex.tesionsnBy using RDFa and microformats instead of custom site-specific parsers (like is the case now for e.g. video search), this is especially designed to allow every site be indexed, and not just the major players.