Apart from the contributions, you also could consider those who don´t power down and sell Hive tokens and by this creature sell pressure on the markets. E.g. like myself😃, I never ever powered down a single Hive.
Or the ones who are actively participating and engaging. In order to find out, you can check these monthly reports
https://peakd.com/hive-111111/@quochuy/4trgaq-witness-earnings-monthly-report-december-2024