What "titles" do you avoid/click on when it comes to money-making emails?

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I was thinking of running a few marketing campaigns in relation to money-making opportunities but I don't want to get my email flagged as "spam". So, with that being said, what titles do you usually avoid? I am sure the obvious ones are ones like, "Make $1 MILLION TODAY!" or, "Make HUNDREDS OF DOLLARS FROM HOME.". But other than the obvious ones like that, which do you generally avoid? Now, on top of that, I am also curious which emails encourage you to click to read more without feeling like you're getting spammed? I am not planning on making any promises. I have a rough estimate of potential profits but that really depends on the country the individual is from. So what are appealing titles to you, and what are not so appealing titles? Thanks in advance for any help!