I think the key point is that they don't want the top 10% or 1% or .1%, they want as many people as possible above some particular skill level. The client is just as happy if that happens to be 50% of players or whatever.
They don't want "the best" candidates, they just want competent ones.
Clients would be irrational to pay for a recruiting service which removed 0 bits of uncertainty as to the quality of presented candidates (by the client's definition of quality). It's safe to generalize that recruiting services which survive reduce uncertainty or at least give a strong impression that they do, i.e., they discriminate among candidates in some way (I don't mean discrimination in the legal or pejorative sense).
This isn't an accusation of wrongdoing, just a simple observation about reality. The incentive for a recruiter using a game like this really isn't for every candidate (err, I mean, player) to be seen as equally recommendable. Even if you were so suicidally idealistic that you saw it that way, clients wouldn't. But you aren't stupid, you know that.
quote66555 is right to think that there is an incentive for extensively recorded details to be used as a signal of his individual "quality" as a candidate. And if he is not in the top n% (where n < 100) then at best he will not be recommended. So it is possible that his little delays or minor fuckups will count against him, assuming he cares about being recommended. It's a reasonable thing for him to think. He isn't scare-mongering.
We promise: your data is private. Nobody sees anything you do unless you want them to. It doesn't matter what employer incentives are; revealing a log of how you've engaged with this CTF would involve us breaking a promise to you.
Meanwhile: what we're doing as a business is opt-in. If you don't think we're trustworthy, there is absolutely no reason to work with us to help find jobs. Just goof around with the game and ignore the fact that we do other stuff. We are no company's job interview.
>>>Most of the best performers on this CTF aren't going to get placed by us.<<<
It's frustrating talking about this, because we've had our hands absolutely full just getting a CTF that's better than Microcorruption done. We haven't had a spare moment to think about how to make money from it.
Catch me sometime when I'm not debugging a weird interaction between my emulated SPI bus and my emulated UART. :)
They don't want "the best" candidates, they just want competent ones.