For those who don't know we have a cool little feature named watchlist, which allows you to monitor any particular code in WebKit repository. You can specify the files/folders to monitor (in https://trac.webkit.org/browser/webkit/trunk/Tools/Scripts/webkitpy/common/config/watchlist), and whenever any patch modifies those, EWS would cc you on that bug.

Watchlist was partially broken for a while (because of containing incorrect email addresses). I just fixed it in https://bugs.webkit.org/show_bug.cgi?id=201433. So, now you might see EWS cc'ing bunch of people, more frequently than previously.