http://34reqsy6tqou6avwrkm23s4mpkrwz3drtq2e5yr7sywi76h7plnaahad.onion/articles/libertarianism.xhtml
Absolutely insane effectiveness. Another example (archive) (MozArchive) : Of the 88 percent of consumers who notice OOH ads, 78% have recently engaged in some way. Over three-quarters (76%) used a mobile device to learn more about a product featured in an OOH ad, just over half (51%) used their mobile device to search for more information about an advertiser, and 43 percent made an online purchase. 78% of people who see ads engage with them, and 43% buy products advertised in them.