I dont think it makes a great deal of difference anymore and traffic from their is non existant aswell, so makes you wonder how they justify their huge price tag to be included to be honest, IMO.
doing seo like every method also do some yahoo answer and make sure your all other thnk like site map and keywords on pages are in right way
you need to do lots of bookmarking forum posting blog posting and have to more yahoo answer because only backing gives position on yahoo or other SE
i dont think so you or any one have to take a different way to get any site link on yahoo search its enough with SEO and yahoo answer