There was a time when webmasters could get lots of traffic from forums but since spammers took advantage of that forum owners decided to make it a lot harder for spammers to promote their sites. There are some forums where posting links isn't allowed. If you can't post a link then obviously you can't get traffic from that forum, right? Ask anyone what's the easiest way to promote your site and they'll tell you to join a forum, be active and traffic will come your way. Question though is, have spam-fighting measures put in place by forum owners made it harder to promote sites on forums or do forum signature and profile links work just fine?