The review service is based on reviewing your content across the internet. The Bronze is for up to 5-pages, Silver up to 12 pages, Gold is up to 30 pages and Platinum is up to 150 pages. The Diamond service is for a full review of all your internet presence based on Search criteria.
The options are per article and that is based on a maximum of 400 words per article. If it is a blog writing service see later.