I stumbled onto this through my Twitter feed. It appears to be legit.
From the "about us" statement at the bottom of the page: "This bulletin provides updated listing of paying and no-cost opportunities for literary and freelance writers. Maintained by writer-volunteers, this not-for-profit initiative is updated twice daily, 7 days a week. We spend 16 hours daily to find, edit, and format writing opportunities/ announcements for our readers."
Solicitation to those who have stuff to share: "Send your inquiries or announcements (no-fee competitions, paying calls for submissions, and writing/ editing/ translation jobs that pay at least $10 per 500 words)."
Tabs at the top of the page: Freelance Jobs; Paying Markets; Free Competitions; Scholarships/Funds; International Opportunities. There appear to be many items under each tab, with deadlines still on a far horizon. In other words, it's a good place to browse. It doesn't look like you'll get rich publishing or apply for any of these items; bragging rights are probably going to be more valuable in the long run.
There are also many paid advertisements; it's a way this blog gets money to keep itself in operation and make it minimally worthwhile for whoever is behind it. I'm not saying "don't click on the ads"--rather, "caveat emptor, buyer beware" of stuff that isn't part of the blog, but is added as paid advertising.