Unfortunately there are some publishers offering publication opportunities but their publishing practices are not acceptable in academia. Some offer options for publication in non-existent journals, whilst others provide no peer-review or editing services or other added value. Some charge excessive article processing charges to authors. To find out who these publishers are, you can do a search on Google under "preditory publishers" and you will find a list of them.
Before publishing, just make sure that you are publishing in a reputable publication, by a reputable publisher, with proper peer-review, editing and other acceptable practices.
If any Wits staff or students are contacted by any publishers to publish their theses/dissertations or republish their articles, please contact Wits Scholarly Communications and Copyright Services Office (Denise.Nicholson@wits.ac.za) or Wits Legal Office (Dawn.Taylor@wits.ac.za) before publishing your work, as the intellectual property belongs to Wits University.