You could! It could help DDG make lots of money. However, my thought was if that (privacy) was not the main goal and something comes along, e.g., $$$$/partner

You could! It could help DDG make lots of money. However, my thought was if that (privacy) was not the main goal and something comes along, e.g., $$$$/partners, that could catapult you to become a market leader/giant in your core goal area then given the principle of most startups to focus on a core competency and to do it really well, the secondary goal (privacy) could be compromised. EDIT: I don't have a list but I'm sure there have been cases where companies tweak their policies once they gain traction.