I can empathize with the frustration, but it definitely makes sense for LinkedIn. Unlike Facebook (which also has difficulties for development), LinkedIn has ma

I can empathize with the frustration, but it definitely makes sense for LinkedIn. Unlike Facebook (which also has difficulties for development), LinkedIn has many monetization strategies besides advertising. They must be strategically very careful not to let anyone else monetize their professional network graph. They are only opening up in response to Facebook and to attract more people to the site.