alt Hacker NewsWouldn't be a fringe. I get most marketing emails with a name as if a person sent it.
Catchy subject seemingly target to me. Same for content.
But you are right, it's more likely enough users marked them as spam that Google algorithm decided the source is the spam.
Oh the 'real name' thing I see all the time, often just using the founder's name, but only the more growth-hacky companies seem to purposely cycle through the names of their other employees for sending marketing content.