If the vast majority of applicants from one bootcamp claim to be employed by them then I can see why you would be suspicious, but I’d be hesitant to throw out all bootcamp grads who say they’ve been employed by their bootcamp.

There might be perfectly legitimate reasons to be employed. Maybe they were aiding instruction of earlier students as they got more experience, akin to a tutor or teaching assistant in colleges. Maybe they took a temporary job because they were unable to find a job right out of bootcamp, and the reasons for not being able to get a job don’t necessarily have to be negative (e.g. they had familial commitments).

Getting a job from a bootcamp is already hard and it wouldn’t quite sit right with me to reject someone outright for something that could be explainable. Perhaps if you are drowning in applicants then you are forced to be harsher out of practicality, but even then surely there’s a better filter then someone reporting what is ostensibly an experience applicable to job they’re pursuing.