Gamification is extremely relevant for extended enterprise solutions because the users participate voluntarily and anything you can do to make the experience and content engaging and sticky is key.
A key to my success was the ability to ferret out unspoken requirements (landmines) by conducting good discovery and exploring deeply in a whole range potential functionality.
Many LMS companies who were not recently acquired (for example, Net Dimensions, eLogic Learning and Expertus) as well as hundreds of startups have tried to fill this void and still cater to multiple extended enterprise segments.