Why People Don't Respond to Cold Emails

I operate a spam trap.

If you do this: -

"Camouflage: Mimicking subject lines that the recipient is already used to seeing is an easy way to get a message opened. This is a way to catch them off-guard and force them to opening your email."

...your email will be filtered as spam and your victim will never even get a chance to think about opening it.

Spammy is as spammy does.

By "cold email", does this guy mean what most of us would call "spam"? I can't tell how what he's describing isn't just spam.