We'll create fresh WordPress site with Virtual Queue installed. You have 20 minutes to test the plugin after that site we'll be deleted.
By using this plugin you’ll be able to allow only a specific number of visitors to navigate through your website.
The extra influx of visitors will be kept in a virtual queue until a new space will be available.
You could always use the following shortcode [virtual-queue-position], in order to display the current user position into the queue.
Installation
virtual-queue
directory to the /wp-content/plugins/
directory