Hah, comparing popularity by the number of appeals to websites is as stupid as by the amount of traffic. Because one book is usually enough for a week on average, and some social networks can be viewed at a speed of up to 1 page per second, music and video last a few minutes, modern games are constantly climbing into the network, even if they are not online.
And what is fun, all my button phones had built-in games, but there were no built-in readers, and in the new smartphone there is no pre-installed game, but there is a pre-installed reader.