DuckDuckGo, Duck.ai, & VPN

"Ad clicks are managed by Microsoft's ad network and Microsoft has committed to not associate your ad-click behavior with a user profile and to not store or share that information other than for accounting purposes."

When users click ads, their interaction data is handled by Microsoft's ad network — a third party — though Microsoft has committed to limiting how that data is used.

"We will notify you of changes by posting the modified version on our website. We will indicate the date it was last modified below with an update message on top."

DuckDuckGo can update its privacy policy at any time with no direct notification to users — changes are only posted on the website, and continued use implies acceptance.