How do people make money/gain from these sites?

Ok so this website is a obivious scam to get you to sign up and to post nothing and earn nothing back afterwards, so I was wondering how does webmaster of this site make money? myworkforlife.com

CPA?
Offers them ClickBank Job search products?
Job Search Affiliate Offers
Could be monetized numerous ways, didn't sign up so can't say for sure.

EDIT: Answer is here: This can't be real. Are you giving free money?
No, we are not giving away free money. We are paying you in order to generate traffic to our advertiser's websites. We will get paid from our advertisers for the traffic we bring to them and paid commission to you people.
http://myworkforlife.com/faq.php

https://www.google.com/search?q=myworkforlife.com