If you're spending your time crawling through forums and old bumping posts that might relate to your niche for sig exposure, it not only damages your brand but also risks Google penalties* on your website.
A better way to invest time in promoting your site, for SEO purposes or whatever, is to network with sites and offer them a unique perspective on whatever is troubling people in your marketplace, right now.
Don't underestimate the power of your voice.. when, let's face it.. many in your niche remain silent out of fear of 'what others will think of them'.
So instead of spamming your way to 'success'.. as we're seeing on WF. , contribute something of value to your niche... You'll be more respected for it.
Disclaimer: Been drinking. Who cares.
*I don't know if that's true, but it should be.