Do You Have a Passion for SEO?

If you go from 100 keywords on a page to 200, most likely those new words are going to be in spots 80 and 90. That means that they're not going to get clicked on much because no one clicks on anything there, but they will show up. So I would jump on as much as you can as soon as you can. Honestly, the more you do, the less likely you already get hit.