Talk given at DUMBODevs (http://www.meetup.com/dumbo-developers) on 3/15/13. Another version will be given at RailsConf 2013 in April.
You probably already know that A/B testing is a low-cost and low-risk way to make more money from your website, but if you've only tested surface-level details like copy and button color, you might not be seeing the huge improvements in conversion rates and revenue you keep hearing about. In this talk, I'll first explore (both conceptually and with code examples from the open source gem we've created) ways developers can build split testing deeply into their products, in order to help guide their roadmap by discovering which features customers really want and how much they're willing to pay for them.