Ezine is an article directory only. From their terms of service:
"6.You acknowledge that we do not pay for submissions to our directory and we do not require publishers to pay you for their use of your article. The primary reason for submitting your article to our directory is for the chance to be picked up by ezine publishers or webmasters to be reprinted to their respective audiences. While EzineArticles.com receives many tens of millions of unique visitors monthly, there are no guarantees your article will be reprinted or viewed by anyone."
In short there is no payment for the articles at all.