Here's an odd one. Customer Support at Change.org got back to me on why my email is not considered valid. They do not allow emails that "start with a few words" for spam reasons, like "chris@".

I was like, okay... what if I just try a subaddress, like chris+test@.

Yup, it works. Circumvents their annoying anti-spam with little effort, idk why websites keep reinventing anti-spam methods. #security