Thisisby--Paid to write and comment site

A friend recommended I sign up for Thisisby and post my articles. It looks like a great place to get paid not only for writing but commenting on other people's writing.

Members are paid 50 percent of the ad revenue their stories generate, and people who comment get 10 percent of ad money. It is explained this way in the FAQ section:

How do I get paid?
Every day, we credit half of all the money we earn from ad revenue to our writers. Posts earn a share of that money based on the current goodness of the post relative to the current goodness of all the posts. If, at the end of a month, you have accrued $25 or more, we will contact you so we can pay you.

Huh?
For example, say the site earns $40 in a day. $20 of that money goes to the writers. If you write one post and it earns 250 goodness that day, and all the posts together earn 1000 goodness that day, then you earn $5.

Basically a goodness is the same as a vote that someone likes what you wrote. Thisby allows links in your writing so you could drive traffic to your own site by linking to it. In your profile you can also put a link to your Web site in, so if people like what you write and check you out, they'll probably be interested enough to click your link.

Just about everything is allowed, poetry, fiction and non-fiction.

I've posted one article so far. I'll post my earnings every month.
You can sign up here.