“There are people who get [my newsletter] in their primary inbox every single time, but there’s other people who maybe never ever got a chance to become a reader of the newsletter, because everything from their welcome email to their first 10 [issues] all went to the Promos folder.”
“He estimated that between 5% and 10% of his Gmail-based subscribers never see a single thing he sends them.”
Newsletters were supposed to be the Wild West. Enter Sheriff Google.