Photobucket sent me multiple e-mails during a long time period to alert me about this change. So the author quite willfully ignored those.

They must have sent them to me too. However, the Photobucket account was registered using an e-mail address I no longer use. I found the account by accident, by scrolling through my password manager.

The e-mail account was fully emptied after 1 year of inactivity (with warnings and what not, to other addresses I stopped using). So Photobucket was way nicer than Yahoo from this point of view!