I never linked to my website from this forum, besides the exceptional post once in a month or so.
Today I added it to my signature and the day isn't even gone and I'm at 50 unique visitors (normally about 10 although it fluctuates quite a bit).
Now you can say, yeah but you already have nearly 5k posts.
But Statcounter shows that 90% comes from the posts where I replied today so even people just starting out can get a good amount of traffic.
I really didn't know it would add up that quickly.
Instead of linking to something specific I just named it very broad: "The SEO Blog" and that's it.
Now when you compare forum posting to something like:
- slideshare sites
- video sites
- press releases
Then it wins BIG time.