Not OP, but as someone who took a 6 hour test at full concentration, with no feedback other then a polite 'no', there are a few reasons I don't out them.
1) I didn't score well on the test. It's within reason they read this post and release my scores with a 'it was because he scored low'. Future employers then come across my scores and deny me.
2) Don't bite the hand that's like the hand that MIGHT feed you. You don't yell and storm out of investor meetings. Because then they tell other investors. Similar logic here.
3) This place is very optimistic. Pessimistic people aren't particularly desirable. Whistle blowers are included in the latter group especially by corporate entities. Who knows what it could cause.
It really boils down to the fact that it's not a safe environment to do so. Or at least it doesn't feel so.
Getting back to you with a no (and nothing else) is quite a stretch from literally nothing as OP.
I think you're playing the game of life with your scared setting turned up too high. You might get better results to turn the bold up a bit over time as you gain confidence.
Depends on how large the company is. For small startups, a glassdoor review might be specific enough to identify the candidate. Bigger companies, I suspect won't care and/or don't have take-home tests.
Please name these idiots.