Sure, there are many underpaid studio girls on cam sites, but, in my opinion, they're better off in a studio.
If you want free sex chat, sites like My Free Cams and Chaturbate are fantastic for seeing nude girls without dishing out any cash.
If you want a completely random experience, the roulette chat style of Omexxx might appeal to you.
Also, if any of you remember the early days of live cams you'll recall that it was exciting, but the quality was awful (it also didn't help that many of us were still on dial-up internet).
I've been watching online porn since I was in my teens and not to date myself here, but there weren't really any live sex cam sites around at the time.