diff --git a/Experimental-filters.md b/Experimental-filters.md
index d32a928..fe6fba8 100644
--- a/Experimental-filters.md
+++ b/Experimental-filters.md
@@ -7,6 +7,7 @@ If you find web pages broken by one of these filters, please open a [GitHub issu
 There are currently two experimental filters, which are block-then-redirect filters, to block the following resources:
 
 - `googletagservices.com/tag/js/gpt.js`: Normally [not blocked by EasyPrivacy](https://github.com/gorhill/uBlock/wiki/Blocking-mode#easy-mode).
+    - The effect of blocking `googletagservices.com` by default can be appreciated by looking at how often it occurred as a 3rd-party in [_Easy_ blocking mode](https://github.com/gorhill/uBlock/wiki/Blocking-mode#easy-mode) (which is default uBO settings).
 - `www.google-analytics.com/ga.js`: Normally blocked by uBO, but blocking this resource has sometimes led to page breakage, so exception filters have been required. By forcing a redirect to a neutered version, the goal is to reduce page breakage while avoiding the need to create an exception filter for some sites ([example](https://github.com/gorhill/uBlock/issues/1081#issuecomment-165501960)).
 
 Note that these two experimental filters use the `important` filter option, so they will bypass any existing exception filters.