Uh...I actually prefer forums that aren't owned by the organization in question. I find them to be much more impartial. For example, if you're on a forum owned by XYZ Corp, and you say something bad about a product, sometimes XYZ Corp will delete the posts... quite stifling for discussion. Not every "independently" owned forum is better, mind you - some will bow over to demands from the organization in question - but usually they are.
And I doubt he's making money on it. He's lucky if he is breaking even. I say this as someone that runs his own forums for the B-van (which I don't have ads on - I pay for it out of my pocket, because I know I'd never sell enough ads to make it worthwhile) along with two other websites. I pay about $200/year for my hosting, and my sites aren't even that popular - something like the WBCCI forums, with more users, would certainly cost quite a bit more.
1995 Airstream Classic 30' Excella 1000
2014 Ram 2500 Crew Cab with Cummins 6.7L Diesel
Sold but not forgotten: 1991 Airstream B190
Sold: 2006 F-250 6.0L Powerstroke Supercab