Great topic and great link.
I'm not active on Elance, or Guru for that matter anymore, but since my profile is there on those sites I still receive requests to submit a proposal for jobs from PCs. I don't answer them because my time is worth more than what they are willing to pay; and I have bills to pay. I'm not going to settle for $5-$10 an hour (or even less). I find networking with VAs and using social media has been the best way to go for me.
Not saying I wouldn't respond to one that paid a worthwhile rate, though!