I don&#x27;t believe this 100% true, unless you use an effective ad blocker.  Data Management Platforms [0] (such as Krux, Bluekai, etc.) exist to keep track of the different sites you visit so that they can place you into various audience segments.  It&#x27;s unlikely they have a &quot;bonsai&quot; segment but you probably fall into a &quot;gardener&quot; segment, as the sites you visit to read about bonsai trees are most likely classified as a gardening website.  Any site can signup with a DMP and offer advertisers the ability to target specific users (i.e. gardeners).<p>Advertisers are always looking for better ways to target a specific audience, publishers are looking for ways to charge higher CPMs, and DMPs are helping both achieve their goal while tracking you across numerous sites on the internet.<p>[0] <a href="http:&#x2F;&#x2F;digiday.com&#x2F;platforms&#x2F;what-is-a-dmp-data-management-platform&#x2F;" rel="nofollow">http:&#x2F;&#x2F;digiday.com&#x2F;platforms&#x2F;what-is-a-dmp-data-management-p...</a>