This doesn't bother me at all. You could have a vibrant and important community that wasn't on that site's radar.
I am well aware that we are tiny compared to the most active boards on the internet.
The thing that I find boggling is that when I search that site, there are *58* (yes, count em, 58) forum sites listed that are indexed with the keyword "business." And the majority of those are NOT business type boards. A couple are marginal - one is clearly an MLM/quick buck thing, and another one is "work at home" support. "Freelancing"? Sections of a couple of different gamer sites.
Slashdot probably comes closest to being a major player that actually has significant business and technology career related content. But it's dwarfed by the time wasting amount of typical Slashdot material.
Large message boards are, by and large, leisure time garbage.
I honestly don't think we have much, if any, competition, in our category. But it is also clear that our category has niche and not broad appeal. I think changing the name & identity a bit will help those interested in this niche find us.