One of my answers was selected as The Best Answer and I'm receiving a lot of traffic from that answer since yesterday! That answer includes a link to one of my articles in my blog...
answers has got me some traffic recently. Some members from my site gave a link back to my site and i was happy to see an increase in traffic.
Google Webmaster Tools used to show several links to my site that people had put on Yahoo Answers. But it doesn't show those links in the list anymore. I don't know why they were dropped.
Yahoo Answers is definitely very good for generating traffic. But like many have said, it's no follow attribute doesn't help your site SEO wise. But, as far as eyeballs to your site, it really is almost as good or better than a properly "digg" or stumbleon surge. I've seen a short term burst of a few thousand visitors, as well as steady traffic of a few dozen to hundred a day from a good answer. MR
if it brings traffic I don't mind I'm sure they have ways to control spamming though, probably with teh ban
IMO, having a good and informative answer, I think that's not spamming but having a useless answer then attaching your link then that is spamming