CreateBB is now offering paid advertising. We will advertise your website or forum for a small fee every month. We do have different ad spaces and prices (depending on the ad space).
Screenshot of our stats

Sidebar(shown on every page except the support forums)
$3/month or $30/year

Header(Support Forums)
$5/month or $50/year

Topic View(Support Forums; between every 5 posts)
$3/month or $30/year

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Please PM me if you would like to buy an ad space!
I'd also like to add the your advertisement banner should be 468x60 for all spaces except the sidebar. That should be 125x125.