This is a technique for obtaining a one-way link from a forum. It is not entirely above board, but it is hard to spot for webmasters and admin, so unlikely to be noticed. Most forums have “do follow†links and let you have one link in your profile but that has to be a simple URL link. What if you want separate links to different sites, or links that have some keyword relevance? In that case you are in trouble, many forums will not allow links in a signature, unless you have a set amount of posts under your belt, and nearly all do not allow links in actual posts.
Yes it will still help you In my opinion nofollow still helps with seo...and you will get direct traffic as well
first at all, backlink is still backlink no matter it is dofollow or nofollow second, forum posting is helping more on explore your site than get backlink
More spam, you really don't have a clue do you? EDIT... Scuse the seemingly random post. Someone was spamming the fook out of DP with linkwheel services. I started slowly coming uncorked lol.. Nigel
Forum posting is the best way to get unique traffic. Nofollow forums can generate you huge traffic but it will not help to you improve ranking and dofollow backlinks help you to get traffic as well as improve your site rank in google.