I did similar analysis for Upwork and results were much much more drastic. Like, vast majority of accounts never earning anything, and a bunch of multimillion dollar accounts (most of them probably suggesting scams or money laundering - that was before i became a $2M account myself lol), and majority of money made by people who make very little, <$1000 per month, but stubbornly trying for years and years, probably having no other way out. Grim picture.