First, the vast majority of CL fliers do not fly competitively. Secondly, the majority of available CL kits are of use to those people, as are the ARF's. From numbers Dick Byron compiled, about 600 people have flown in a CL stunt contest over the past several years. That's maybe half of PAMPA membership (and some of the competitors are/were not PAMPA members) I would guess that PAMPA includes maybe 10% of the people who actively fly CL. I'm basing this on clubs I belong to and people I know; your local anecdotal sample.
So far as CL stunt goes, there are no secrets. Everything there is to know has been printed more than once, and put on the web several times. I don't know how it is in other areas of CL. The top fliers are very forthcoming, as are the rest of us when we think we know something.
If you look in hobby shops in the Austin area, a 1.5 million person marketing area, you will find a couple of reels of useless Sullivan Tuffstrand kevlar lines and a couple of Sullivan handles. That's it for CL.[

] So the only way a person in the Austin area is going to get into CL is to find one of the half dozen active CL fliers in the area , or go it alone on the internet. At the moment, it is basically a bunch of retired folks. Others have come and gone as work, etc has caught them up.