This is fun to speculate on, however it has come up before and there are some other realities that inflate the marketplace numbers.
Zeroqode and others have also bought many templates and plugins from other builders, and the prices of many plugins have changed since they were first created. So exact numbers and who earned them are impossible to know.
Another thing I have found since starting in the Plugin marketplace this year is that the Install numbers are wildly off, especially if the Plugin in included in a Template. My TopCal plugin page shows 762 installs, and I can assure you it is not even anywhere close to that for actual monthly paying users 