Hi Eliana,
I read the terms of becoming a content creator and it says you can not copy and paste or change words from an articles posted somewhere else. However, it also says that you must own the rights to the post/article in order to post on their site. It is a little bit too much legal stuff. They do ask for examples of previous posts done online with the links to them, before they approve you to be a content creator on their site.
It is a bit discouraging, but I am going to keep being a curator for a bit and then decide what to do. Hope this helps your questions.