“[A report] described how “star tutors” who can fill lecture halls have become a phenomenon in places like Hong Kong.
[The report] cited two South Korean celebrity tutors: Woo Hyeong-cheol, who reportedly earns $3.9 million per year offering Web-based math classes to 50,000 students; and Rose Lee, “the Queen of English,” said to earn $6.8 million per year, also through online classes.”
From a fascinating article on cram schools in Asia in the NY Times:
Tutoring spreads beyond Asia’s wealthy
90% of Korean primary school kids go to one!
TEFLtastic 
Having researched it a bit further those figures look like classic passing on of ill researched urban myths, especially as in the earliest articles on the topic she is predicting 7 million dollars rather than bringing it in and they would obviously have a motivation to make themselves sound as successful as possible (as did all the Koreans who were found to have made up qualifications on their CVs).
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Seems the reason why we are not celebrity tutors is because we don’t spend 99% of our English lessons speaking L1.
I still very much doubt that that woman with a chalk board and seemingly no ability to actually speak English makes seven million dollars.
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