Udacity gets some revenue from corporations, including Google, for developing high-level, specialized courses.

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The niche community builds its ranks primarily through word of mouth and specialized courses at elite MBA programs, with very little recruiting or publicity for the model.

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There is evidence this is happening in several places--from helping small, rural or low-wealth schools where specialized courses would not otherwise be available to serving students who need special tutoring, or for whom attending the normal school day is not an option.

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The league table is officially known as a 'meta ranking', bringing in statistics gathered from the London-based newspaper's five more specialized rankings compiled earlier in the year, for global MBAs, executive education courses, masters degrees in management and Executive MBA (EMBA) programs.

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