That's a measurably false statement. Email marketing is done so aggressively because it's so successful. Marketing is about conversion. It's not about making ev

That's a measurably false statement. Email marketing is done so aggressively because it's so successful. Marketing is about conversion. It's not about making everyone love you. Having a 1M customers who like your brand and don't buy anything is less valuable than 10K who spend actual money. You may be equally shocked that direct mail (ie paper mail) still have extremely high conversion rates which is you still get so many ads in your mailbox.