My website costs about $4.95 a month, and I have thousands of e-mail address capabilities, 1 Terabyte of data transfer per month, and the ability to have a php forum...
More expensive plans go up to about $30 a month, that could cover the data transfer of this site...
Nonetheless, I agree about the forum being about 90% of the traffic. I also think that it boosts sales for Mr. Holt... and that is alright!
More traffic = more views of your product = more sales of your product.
I think the free forum is a terrific idea. It benefits us all... including Mr. Holt.
Who is your host?