Marketers, "growth hackers", and senators don't get to define spam.

Users -- especially those hitting the "spam" button -- define spam.

Whether or not something is considered spam depends largely on whose interest you're serving by sending it: the sender's, or the receipient's.

> Stop saying "spam" and start saying UBE - unsolicited, bulk, email.

> As soon as it's bulk and unsolicited it's spam

Did you mean to write this? You essentially said to stop saying "spam" and that this is spam...

Well, yes, I see that's confusing. "As soon as it's bulk and unsolicited it meets the minimum definition for what most people would call spam", perhaps, or "as soon as it's bulk and unsolicited your hosting provider is going to think it's spam".