 "Internet Game Timeline: 1963 – 2004" , Dave Spohn, About.com, 2 June 2011 Non-subscribers were limited to certain types of game play or certain games.
<coherence>  "Internet Game Timeline: 1963 – 2004" , Dave Spohn, About.com, 2 June 2011 Non-subscribers were limited to certain types of game play or certain games.
 Non-subscribers were limited to certain types of game play or certain games.