How much work are you doing at these 10 companies? Are you writing code or just literally doing nothing?
Many of these positions are mid-to-senior level in "must have" positions like Data Science or Data Engineering where measuring progress can be difficult for even full-time contributors. I target overly funded growth-mode companies where they're focused on adding unnecessary headcount to work on poorly defined projects.
This line convinced me you know what you're talking about :).