So how do clients process this sort of feedback? As a dev, “negative user feedback” gives me scares that “failed behavior testing” does not.

The AI isn’t mad, and won’t refuse to renew. Unless it’s being run by the client of course.

Are clients using your platform to assess vendors?

No, we don't have a lot of usage in that direction. People mainly use us to log into websites and either fill out forms or download files!