This is a very simple concept in the Traffic Exchange business. As a free member, you get to click 50 sites and earn a few cents every day. In some countries, this may be a useful amount by the end of the month, but it's not for everyone. On the other hand, clicking 50 sites should take less than 30 minutes, so it's not a lot of time to use.
I think the main point about getting a small amount of cash from this process is that it gives you a bit of trust in the site, and it's also a useful "hook" for the advertising campaign. And even as a free member, you are eligible for $10 commissions on sales of upgraded memberships.
If you're involved with traffic exchange marketing and have been struggling to make any cash out of it, then this is a useful tool to add to your business,