Amongst other things: The first revenue stream will come from selling URL status information to companies like Google and Altavista. This status information will enable existing crawlers to target the crawls for a particular day, based on the highly up-to-date information contained in our database. These status updates are similar in nature to the service provided by someone like NetMind, in which a change on a website triggers an action. Grub's database will be much vaster by comparison however, enabling it to provide services directly to wholesale search engines.
Second, Grub will begin selling "wholesale searches" to other search engines and companies. Grub will make strategic alliances with other search engines much in the same way that Google has done with Yahoo and Inktomi has done with Hotbot. Grub will also provide one-shot search results for a large search query, delivering the data in a database format (like XML) instead of a web format.
hmmmmm "Large sites who's revenue depends on sustained inbound web traffic will be charged based on the amount of data that they submit into Grub's database, and on what placement they get in Grub's search result sets..."