How to bulk add vast amounts of posts

Try the following:

  1. Right click on this link and save the XML full of dummy content provided by WordPress
  2. In the sample data, you can remove the unwanted data such as pages, comments, categories, etc.
  3. Go to Tools > Import in the admin panel
  4. Install the “WordPress” importer from the list
  5. Activate & Run Importer
  6. Upload the XML file
  7. Map the authors in this export file to users of your choosing
  8. WordPress will then import each of the posts

If this doesn’t satisfy, I’d recommend looking into plugins that generate dummy content to your expectations