two must read articles on benchmarking facebook games/apps -- average sticky factor is 18% for top 25

http://www.insidesocialgames.com/2009/10/27/the-sticky-factor-creating-a-benchmark-for-social-gaming-success
http://www.voncoelln.com/eric/2009/08/04/benchmarking-your-facebook-application-how-engaging-is-it/

The average “Sticky Factor” for the top 25 applications on Facebook is 18%.

Of the top multi-game providers Zynga and Playfish are way ahead the rest and have some winners and under-performers:

  • Zynga (16.3 mllion daily active users): Farmville 31.2%, Mafia Wars 25.4%, Vampire Wars 24.9%, YoVille 20.3%, Texas Hold’em 19.4%, Street Racing 16.4%
  • Playfish (8.0 million DAU): Crazy Planet 33.6%, Restaurant City 29.8%, Pet Society 26.1%, Word Challenge 8.6%, Biggest Brain 7.4%, Geo Challenge 7.2%,