Also its more than a little disingenuous on the part of the company. It communicates "my time is more valuable than yours . Go do this thing async so if you don't work out I don't have to waste resources on you." It also drives a perverse incentive on the part of the interviewing organization. The only resources you've spent is the time to send them the test if you are unmotivated or are having second thoughts you don't even have to look at the candidates work. But the candidate might spend hours on this thing.

I prefer an interview system where the company and the candidate both care. Commitment is a requirement for everyone.