Veribo.com / Meytal Lavie Seeked Writers, Obtains FREE work and then ignores them Israel, Internet

I applied for a writing job with Veribo.com, and I was asked to sign a Non-Disclosure Agreement, which I duly signed and returned that same day. I then contacted Meytal Lavie, the director of Veribo.com, and asked whether he would be sending the sample text that I needed to write. He responded a day later to say that he was busy and he would now like to proceed. I wrote a text for EBS Marketing about Facebook Marketing, returned it within the said timeframe, and I have heard nothing. I even sent a follow up email asking whether or not he had made a decision. 

What a waste of my time. Veribo.com obviously wanted a free write up about a company, but my time is precious, and this company have taken advantage of my good nature. I mean fair enough if they didn't want to hire me, but to ignore me is unprofessional and I doubt their business will last long if they treat their contractors in such a way.