I notice you ignored all of my several very specific points directly related to his issues with the database system and your only comment was a criticism about the tone you perceived.

OK, maybe he is using humans to do data entry. The home page to me implies that the process is automatic, but I guess it doesn't rule out the possibility of humans doing data entry when he says 'tag and categorize'. But if he is using humans to do data entry instead of some automatic OCR, that is still his main business problem, rather than MongoDB. The application is relevant to the database discussion, and Hacker News is about all aspects of startups.