Toi Wiley has indicated via a "Not a Member?"

Earlier today I logged in to FTH as Admin to change something and received this message on the Log in:[2022-08-04 2:25PM GMT, FreeToastHost System Notification]
Toi Wiley has indicated via a "Not a Member?" email link that they are no longer a member of club
496 and has requested that the system move them to Former Member status.

This message is to notify you that the system has completed this request.

If you have any questions about this notice, please visit support.toastmastersclubs.org .

According to Toi she went to update the speech title. Was the website hacked?

NO the website wasn't hacked.
On the agenda she either clicked the not-a-member link at the bottom of the agenda and then clicked the link in the verification email.
or
She marked a valid email from FTH as spam and yahoo notified us she no longer wanted email from FTH so she was moved to former member.

Which ever way, she did an action to cause her to be moved to former member.
You as site admin can move her back.