I use forums mostly for link building, the sales are secondary. Advertise on 20-30 forums, you can generate as much as 50-100k in new links & back links per year. This play directly into your search engine position, which will ultimately get you more customers. And these can be huge differences - a couple years ago we only got 200-300 unique page views per day and less then 4-5 new paying (internet) customers per day. Now we get 3-4 times that # of unique page views, and as high as 25-30 **new** PAYING (internet) customers per day. When your average online cart is $160.00... That is a pretty significant difference for some basic SEO work on what was just a small portion of our business.
For us, the same profit margin that exists in a million a year in retail sale products is the equivalent of 3-4 million dollars a year in wholesale manufacturing. Production work is crap money - even when properly bid - I dream of the day I don't have to deal with some of our job-shop work customers. But to answer your question, yes, I need web based forums - just not for the same reasons that others would think... And whether or not the internet has burned you (and I know its burned many), there are still great opportunities out there and I hope you give it another shot at some point.
Side note: I hadn't heard that tuner toys went down. That is terrible. Stand up guy.