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, see: https://libguides.wits.ac.za/openaccess_a2k_scholarly_communication/Predatory_Publishers
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 or Wits Legal Office, before publishing your work, as the intellectual property belongs to Wits University.