Marketing emails that say "Name from Company"

Every single day I check my emails, I see "Amanda from Jawa' or "Zach from scammy investment LLC" and i don't get why companies do this. Everyone knows it's not really a single person, and most people block it anyway. If you're going to send spam mail, just put your company on it or something. I know I disregard spam mail of all kind in the first place but it's still so annoying to see in the first place