This is the file output that profile left sidebar.

JoomlaFolder/modules/mod_easysocial_sidebar/tmpl/profile.php

Once you modified, you have to override this into your current template override file location JoomlaFolder/template/YourCurrentTemplate/html/mod_easysocial_sidebar/profile.php so you no need to redo this when you update next Easysocial version.

Don't I need to have a directory /tmpl/ in the receiving folder?

Don't I need to have a directory /tmpl/ in the receiving folder?

Yes, no need that tmpl folder, did it not work?

The main file worked, but the override, I don't know... I will take a leap of faith

Alright, keep us update if that override path not work.