He specifically mentions the fact that even average, B actors have agents. These are guys who make less than many developers do. Yes, the Ari Golds are not representing them, but some agents are, and they presumably find them jobs.
In my brief tangles with the industry, I noticed that it was common for an agency to have a few A listers, then lots of B listers. The model was that the A listers would pay the bills, and it was worth lavishing time and attention on them. The B listers would be effectively put in a holding pattern with just enough effort spent on them that they didn't go anywhere else, on the off chance they eventually became A listers. The B listers could say that they were represented by a firm with real legal clout, and the agency could inflate the number of actors they were representing, but other than that the benefits seemed to be pretty intangible for the B listers.
