In the years following my first job out of school (decades ago) I can't recall any work that I have gotten by going to these sites, or dealing with monkey tests. Work comes because of my reputation and experience which speaks for itself. At conferences people give me their card and tell me to call them if I am looking to 'move up', which generally means "pay more than the last guy". Any time one contract or job ends, I look through these cards. Most of the time I get several phone calls from people I have met of the sort: "Hey Bugsy, I heard rumors of ABC Corp having layoffs. You looking to get out? We have a position..."
It's bad enough when the interviewer wastes more than 10 minutes of time with puzzles. Having it be automated so it can waste hours and hours without any human feedback is extremely offensive. Whoever designed this system knows nothing about acquiring talent.
The note in the article that in the future the site is going to be augmented with "real world tests" that force the user to design entire sites or otherwise labor for free borders on criminal since they are forcing you to do real work and you're not getting paid for it, in violation of state and federal labor laws.
If you haven't already seen examples of someone's work before you contact them, maybe you shouldn't be hiring them. Or maybe you need recruiters who know what they are doing.
Again, I have no doubt that desperate people who are unemployed because of their incompetence or lack of skill will not have any problem devoting the hours needed to google answers, or to hire third parties to help them complete these tests. I am sure complementary businesses will now open up that sell test answers to desperate applicants for a fee.