For ArcGIS Online, admins have the ability to shut off the social media logins - because we are Google/SAML, it was creating a lot of confusion with users that they can't log in using the normal Google button. So I eventually shut off the social logins for ArcGIS Online just to prevent users from accidentally creating a project on the public site.
The remaining complication is the Story Maps (https://storymaps.arcgis.com/) site. Even if a user has an activated account, if they search for "ArcGIS Story Maps" and go to this site instead of Online, the social logins still remain.
• If you have SAML login - users need to click on "Your ArcGIS organization's URL" in order to log in to the correct account.

This has caused at least a couple of projects each semester to be created accidentally on the public site.
I'm not sure if there is a good way to consolidate the admin functions - but it would be extremely helpful if there was a way to shut off the social logins on the https://storymaps.arcgis.com/ site.
Thank you!