Ah ok. What's with the "unpaid labour" part?

It's also in the original post. Greptile, HockeyStack, and others from that cohort of 20-year old founders out of YC were having software engineer candidates come in day-in and day-out, staying until 9PM under the threat of being rejected if they left earlier.

They were not paid at all, they were working long-term on a "trial period". And yes it's very illegal. I was there and saw it first-hand.

The guys they had on trial periods - though I'm sure they were very intelligent - were not really firing on all cylinders if you know what I mean.