Hi Max, and welcome to the E-Learning Heroes community! ✨
A reviewer who has had an Articulate ID ever (from a trial or regular Articulate subscription) will be asked to log in when viewing a Review 360 link.
The benefit to logging in is you can manage the notification you receive.
If they do not wish to log in with their Articulate ID, they can use a different email address.
If someone is unsure if they have ever had an Articulate ID, they can reach out to our support team here so we can verify if they've had one or not.
I hope that helps, and please let me know if you need additional assistance!