Our marketing playbook has 2,000 spam users. Added before we put captcha on. And the system still allows 2-3 users a day who are breaking through captcha (so I turned off new user adds) and I need to get rid of everyone. Here's how...but becareful because if you set it to 999 users as I did and try to delete, it exceeds the URL request length!
Bulk Delete WordPress Spam Users
Now I deleted these 1 page at a time and I am not sure if you have checked but you can only delete 20 at a time on the pages. So what would that be 200 times. How nice would it be to be able to do a mass delete of just the subscribers. Well there are a couple ways to get this done easily. One most people don’t know about the option to up the amount of users shown per page. Really simple to do this go to your users section and click the Screen Option. You will find an are with a section called show on screen. You can set this to what you want. Really easy but not known by many.