The LDS that I go to also explained another trend he faces beyond the on-line issue. When he started the shop back in 1991, most of the divers that they trained stayed around and dove locally. You always get people who get their C- Card and never dive again, but he estimated that back then maybe only 10% of his students got certified to go away and dive. Now probably only 10% of the students continue to dive locally. Obviously a cold-water wreck diver is going to be more gear intensive then someone who only dives in the Caribbean occasionally on vacation. He does put together a pretty good basic package that these traveling divers seem to like, but over the years drysuit, tank and other more technical gear sales have fallen off.
A group of us divers, in addition to the instructors and TAs that work with him are looking for ways to encourage the students to dive locally.
Ty