deeper search functions The "booru" style of tag-based image sites have been incredibly successful in this regard. Most of them primarily focus on anime-style

deeper search functions The "booru" style of tag-based image sites have been incredibly successful in this regard. Most of them primarily focus on anime-style content, but I haven't seen anyone else get even close to the level of effective user-driven tagging that they have. Take Danbooru, the most successful such site, for example. Do you want an image of a long-haired character from the Touhou game series wearing a ribbon while involved in a hug? You can do that (search "long_hair touhou ribbon hug") and get over 200 results, all relevant. A large part of this is due to effective moderation in order to keep tags consistent. Now here's the most intriguing part: how does Danbooru make money? They charge for a premium account -- which allows you to search with more than 2 keywords at once. Yes, that's right -- they monetize based on little more than the power of their tagging system. This shows just how important tag-intersection search can be -- and doubly so for porn.