Depends on what you mean by “seeing an ad.” An intrusive video ad on YouTube or another video site, or a bunch of annoying pop-ups? Nope, haven’t seen one in years, either. Non-intrusive banner ads on sites I’ve specifically whitelisted in order to help them financially because I like their content and services? Yeah, seen those, but I don’t mind them, and I never whitelist sites where the ads are intrusive.