--- untainted/app/views/about/_registration.html.haml
+++ tainted/app/views/about/_registration.html.haml
@@ -17,6 +17,7 @@
       = f.input :website, as: :url, placeholder: t('simple_form.labels.defaults.honeypot', label: 'Website'), required: false, input_html: { 'aria-label' => t('simple_form.labels.defaults.honeypot', label: 'Website'), :autocomplete => 'off' }, hint: false, disabled: disabled
 
     - if approved_registrations?
+      %p!= "Please complete <strong>in plain English</strong>, and please write a full sentence explaining why you'd like to sign up. A real person is reviewing sign-ups, to prevent spam and abuse."
       .fields-group
         = f.simple_fields_for :invite_request do |invite_request_fields|
           = invite_request_fields.input :text, as: :text, wrapper: :with_block_label, required: Setting.require_invite_text