The topmost and biggest advantage of having a Wikipedia editor is that he/she will save you plenty of time and will make you do other productive things in the meanwhile. The next big benefit of hiring the professional Wikipedia editors is that they will edit your content without even you asking for it. They keep a close eye on what activities are happening on your page and what changes does the page needs. They also make sure that the content is creative and attractive for the audience.
What do you think about having a Wikipedia editor?