I wouldn't worry about it, machines are not that smart. Google may be able to get to a level where they can do sufficiently clever natural language processing to properly understand a search query. They may even be able to read a blog post and write a sensible summary, but it's going to be long time before a machine can take a complex idea set with arguments and counter arguments and distil it down into a concise single answer. That would take human level intelligence, and those sort of smarts are still a distant dream. If someone does ever solve that problem we'll have a lot more to worry about than a broken internet profitability model.