Probably there is, it could be quite easy for people to spam otherwise, couldn't it, unless the replies were approved, which I doubt.
i have tried to spam it before to undestand what is happening they have deleted my link and warned me after 10 minutes. according to my experience yahoo answers will not allow to make spam
Links are no follow and they are on the lookout for spammy links. If you give good quality answers and can incorporate a link into an answer in a reasonable way, you can get some traffic. I find it worthwhile to answer 1 question or so per week
Create a question related to the content of your website, with username1 then answer it with username2 with a link to your website. Mario
As others have said, you're not going to get any page rank benefit from Yahoo answers. However, I have a site that's had around 30 pages quoted on there. This yields around 50 visitors a day
Yahoo answers links seem to be no-follow which is not good but they can get a lot of traffic and most answers do not seem to have any links so you can get traffic from uncrowded pages. I just posted a bunch of answers linking them back to my site with good content to try to have people read but then continue with the link. I guess we will see how it goes.
it's no good for ranking, but it's good for getting visitors. Answer questions with related links to your site and you will get visitors. Worked for me
It may bring you quality traffic if you post on proper niche. I get some traffic daily from them. great site.
If you have a brand new site and you post your link in yahoo answers it will almost instantly index your site in yahoo. I tested it on a domain that was 1 day old and sure enough the next day the page was in yahoo.