I think the DOJ frowns upon that kind of behavior.
Test once, interview as much as you like for the next, I dunno, two years, no more multi-hour live leetcoding required (the employers shouldn't want to spend money on that, if they just need to make sure you can do it—the certification handles that). Some of the FAANGs already practically publish study guides, so it's not like they're opposed to making the system pretty damn clear and possible to study for. No, it must be that making each interview painful is the point. Else, why would someone who's already passed at two other FAANGs and also the very one they're applying to, a decade ago have to go through it yet again? It's incredibly expensive, and only makes sense if the point is to make sure employees think twice and then thrice about going on the job-hunt again.
https://www.congress.gov/bill/117th-congress/house-bill/6637...