My request is that in the future, when you make a major change to the system like this, that you email the account owners directly, rather than expecting that they will happen upon your blog post about it.

Unfortunately, I haven't checked the blog lately, and all of my collaborator accounts have been deleted.  Not only that, I am unable to add them back.  I get error messages "invalid email", even when I try to add a different email address of my own.