There was a Twitter thread making the rounds a while back in which someone claimed insiders (existing employees, especially if they're able to develop a signifi

There was a Twitter thread making the rounds a while back in which someone claimed insiders (existing employees, especially if they're able to develop a significant social circle in them) in big tech companies do the same thing: when they job hunt, they'll hit their low-priority prospects first, have others with inverted priorities do the opposite, then all parties concerned with have very recent test question lists from their, say, top 2 preferred employers, by the time they interview there. This insiders-have-a-large-advantage factor may be at least part of why the practices survive. People without a friend & colleague network frequently interviewing at those places have a strong disadvantage... unless they hire people to scout for them, which the Twitter poster also claimed is a thing that happens.