I want to second that, with the caveat that, if the exercise is unpaid, I am much less inclined to do it (mainly because I am too busy with paid work to take on more, especially unpaid).

I've interviewed with companies that gave all kinds of exercises. I have no problem with take-home exercises, if they're implemented like the article suggests. A few times I've gotten "do this exercise and we can maybe pay you a bit for your time", followed by them never paying and me never asking. If you decide to pay someone for exercising, tell them how much beforehand, and pay them as soon as they hand it in.

The best interviewing experiences have been with paid onsites for companies, even if I didn't end up getting hired in the end (I got to meet the team, work with them, they took me out to dinner, etc, it was nice).