What shook me up is when top performing coworkers were "laid off" because, due to recent downmarket conditions, there were slightly less competent candidates available at a heavy discount. These top performing coworkers worked extremely hard, were great at their jobs and often sacrificed personally when the company needed them but they were good negotiators as well and had negotiated good, above market salaries.
Once the project took off, the owners fired them and replaced them with cheaper workers who weren't as good but good enough to maintain and update the product.
It feels to me like the owners gave these people an impression that they would be long term employees, where their short term sacrifices would pay off long term, but effectively used them as flat rate contractors while paying them employee rates (instead of contractor rates).
I wish there was a way to detect such owners.