[pandaman]

FAANG don't really want to poach each other that much, as a sibling comment says, they had been already caught in the illegal non-poaching collusion. But even without any such collusion active they undestand that people would jump back and forth between these comapnies, ratcheting TC up every jump.

What they need is that somebody who passed the interview believed it was a lucky break and would not tempt fate trying a similar interview at another company. If they considered the interview just a filter, they probably would not be so lenient with letting people to apply many times and even encouraging this.