No-follow links are good for traffic?

Some forums like DreamTeamMoney and TalkGold forums have no-follow links, so it's no use for search optimizing. When it comes to traffic, no-follow links are really helpful to optimize your sites. Why? If you're promoting in a no-follow site, your link will not be juiced up, as they will not improve your SERPS. However, when optimizing your site is not present at all, you will only get tons of visitors who clicked in your website and to check it out. So no-follow links are good for traffic, but not on search optimizing.