Do you, as designers, note a difference between help and design? I have designed all of my boxes based on guessing and experimentation. (Such ideas include having the aeroports exactly behind the sub, resin concoction) [all of which turned out to be poor ideas btw] but do you feel there is a difference between designing a box and reply for help for simple things like box tuning, port placement, etc. I have provided financial advice to sum that pros charge quite commission for. I don't expect payment for help. I feel I exhange this help for the questions I have.
On the other hand, if someone wanted me to do a full portfolio analysis considering age, income, education, assesing risk tolerances, etc, etc. I would expect to be paid.
In short, my comment here is that people like me don't expect to have to pay for help, I contribute what I can to the forum and you contribute what you can to the forum. But if I asked you to make a box specific to my application, with drawings and details and such. I would then expect to have to pay.