I thought the only successful sustainability model has been attract non-racing sailors by promoting fun (non-racing events) and solicit heavy participation by the racing segments in the form of offering assistance (crew, tuning, boat handling, etc). Then, once "prospective racing" sailors get comfortable, lure them on to the fast boat / racing group. Does this model still work?

What are racing associations doing toward this end?

As far as adding new types/classes... aren't all these "tools" doing the same thing? It's one thing to have a tool box with a saw, hammer, drill, screwdriver, etc. but an entirely different issue if the tool box just has a hundred different types of screwdriver.