I worked at one. I didn't apply - I was recruited by the owner (he knew me from a past job), so I didn't go through the interview process, he just asked me if I'd come work for him, quoted a number, and I said, "yeah, sure". It was a struggling startup, but it was making (some) money, and had (some) potential. But man, when I started interviewing people - he'd tell me, "we only take the best of the best", it was a struggle for me not to point out that the best of the best - or even the worst of the best - or even the best of the worst - had much, much better options than a struggling, no-name startup with no outside capital that was renting office space from an office hotel (and cramming people five to a room). I would go through rounds and rounds of interviewing people, determining that they were perfectly acceptable and would fit in well in the environment we had and could get the job done and help us move forward, and he'd reject them because they were "average". I was like, "so are you, you self-important idiot!"