Twitter Profiting From Third-Party Developers?

Between 50% and 80% of the traffic on Twitter is created by third-party applications, according to Ryan Holmes, CEO, HootSuite, at the panel at OMMA Social in San Francisco Tuesday.

Interesting stat, but consider the source. Consider also the developers networks built by Microsoft for Windows, Apple for iPhone, and Google for Android.

Could, or will, Twitter draw profit from its third-party developer network?