The Verdict: Need More Info
This turns on whether you hold outside, checkable markers of distinction, since South Africa publishes no criteria. List what you can document; if several of the markers below apply, the application is worth making.
The provision grants permanent residence for 'extraordinary skills or qualifications' shown to the Director-General's satisfaction, with no published criteria, scoring or grant statistics. The uncertainty is in the law, not in you.
Markers that carry this kind of application: awards and honours; publications others cite; senior or elected roles in your profession's institutions; being asked to judge, examine or advise; press coverage of your work; pay at the top of your field.
Before spending effort here, check the critical skills list. A listed occupation scores the full 100 points a work visa needs, with no discretion, and Skilled Migration covers it.