That's not the case. These are 2 communities. For example I have domain1.nl which i own which needs it's own forum. Then I have domain2.nl which i own as well which needs a forum as well. They don't have anything to do with each other, besides i own them both. So the users of domain1.nl don't have anything to do with domain2.nl as well (what do cannabis/coffeeshop adresses have to do with the game RTCW? the audience is completely different). That would cost me 2 times the price. That's too much, I'd rather install a free forum then.
I do like vBulletin tho, I translated it to Dutch for a community/forum i moderate for and that's extremely easy and neat

..but not worth 2 licenses for 2 non-profit sites which only cost money to run these days... i do understand it costs 2 licenses and i expected it would: i just can't afford it. Too bad. Thanks for Your clarrifications.