I interviewed at a startup, really early stage, who claimed to be on track for $100k ARR. We all know "ARR" is bullshit, but I didn't suspect the ~$10k monthly to be bullshit. It turns out this was $10k pre-discount, and this product was ~FREE for YC companies, who made up ~100% of this companies customer base. So revenue was $0, or very close to it.