There is a limited amount of time to read in a day and the amount of 10+ year old content that is still amazing is more then anyone could ever read, and it's hard to compete with free.
I think video games is actually kinda an anomaly when it comes to copyright because they have been, on average, getting better and better then games released even in the recent past, mostly due to hardware getting better and better. Also any multiplayer game has the community issue where older games tend to no longer have a playerbase to play with.
Same could be said about movies/tv shows that rely on CGI up until somewhat recently where the CGI has pretty much plateaued.