The topics yes, but on-demand, sprint-like solving quizzes in these topics, and context switching between all of them in short timespan, are these the requirements for the position? Then the compensation must be respectively outstanding? In most cases - no, it isn't.

Seriously, submit your current workforce to this smartass test under condition that they need to pass it to come over to the office tomorrow.

Don't be so quick to judge. Answering any question might have been enough to pass the screen, but you will never know that because you didn't try.

My current workforce had to pass tests much deeper than that. Using database queries, graphs and regex is part of the day job.

> Answering any question might have been enough to pass the screen

Not in this area/location, not in case of this kind of company. I know of cases where the score 67% was too low (2 tasks on 100%, 1 task 0% but missing couple lines of code for 100% solution). It's basically partially automated filter with non-technical people sending rejection emails based on score in the list without digging into solution. I gave up on it not from arrogance, but based on experience.