Just to play devil's advocate, I think paying 100 bucks a day to see every airline in the US in one place is worth the $$$.
Yeah, the UAL job fair will be free. So will the AA job fair, and the DAL, and the AS, and the LUV etc etc etc. Now people will be forced to give up multiple weekends to go see all these different companies and pay for hotels etc.
Not a good thing for the job-seeker. Makes things easier for the majors to see "who really wants it"...