Journalists depended on Reader the way they came to depend on Twitter. They didn't move to another reader.
As for my search engine, I genuinely don't track my users, so I really don't have the fainest how many users I have. 4 people or a million people use my search engine, and I make the same amount of money from it. If I want the search engine to do well, I have to use my own eyes to assess how well it performs.