For clients, associations, and the public. Some website info was developed as a prototype website for the American Society of Home Inspectors. That portion which was ASHI-specific has been transferred over to American Society of Home Inspectors website where I and others maintain it. It's rarely money. Rather it's in establishing valuable contacts with other experts in my fields of interest, and in getting critique and corrections to my data from experts whom I'd otherwise find difficult to contact.
Electronic media makes contact and comment easy.
This feedback and these contacts have been the chief payback for providing the data. Some home buyers read the depth of material I've developed and correctly surmise that I'm serious about the profession and am interested in competence and accuracy. In these cases the quality of material presented encourages people to hire me to perform a home inspection or to consult on specific problems. It's a personal decision for each professional. Different professionals stop at different points along the range of continuing education and public service.