On forums, users are exposed to traditional banner ad space for a much smaller proportion of their time than on blogs. Furthermore, they’re frequently focused on doing something else (e.g. writing a post or figuring out how a thread has evolved) than when they’re reading a blog. As a result, they are less likely to click on your banner ads even when they see them. This means that forum owners require additional ways to make money on their forums. But, many aren’t sure what else to do, or how to get started.