I'm surprised Fog Creek kept commissions around for so long, considering that Joel has been writing articles about how incentive pay causes dysfunction since 2002 (Edit: 2000, even!)

http://www.joelonsoftware.com/articles/fog0000000070.html

http://www.joelonsoftware.com/news/20020715.html

http://www.joelonsoftware.com/items/2006/11/10b.html