I know this is a long shot, but this is the only place I know that has some amount of former Google+ users on it. Perhaps someone has an idea about the following:
Today, I received several mails by Google about their use of personal information in their Gmail, Chat and Meet products. I already know about that - but the weird thing is that this time I didn't receive them for my personal Google account, but for pages (or "brand profiles") I created on Google+ years ago.
Apparently, these still exist somewhere as a sort of sub-profile of my Google account, with e-mail addresses like <PAGENAME>-####@pages.plusgoogle.com. While Google mails sent to that address are forwarded to my personal inbox, mails I try to send to that address myself are rejected.
Does anyone know of a way to access and potentially delete these zombie remnants anywhere?