Codepen.io asks to signup not in an ugly and non-sense exit intent – but when clicking CTRL + S

How much effectiveness can you get from the exit­intent pop­up form you placed in your blog? Does it makes sense to your customers to see it when they leave your page? Or you just placed to see if you get lucky and get some signups? Codepen.io does not like exit­intent forms, but has a clever way to ask you to sign­up when you are a) non­logged and b) tap CTRL+S if you want to save your project. Have you think about using keyboard shortcuts your audience might already doing to get their clicks there where you want?