That is not the definition[0]. I can see how you think it might be, but oligarchy is for governments not monopolies -- even if some cases that line is blurred.

That is not the definition[0]. I can see how you think it might be, but oligarchy is for governments not monopolies -- even if some cases that line is blurred. [0] https://www.merriam-webster.com/dictionary/oligarch https://www.merriam-webster.com/dictionary/oligarch