“They get the idea that all you’re trying to do is send them to a place they don’t want to go, to spend money they don’t want to spend. Put only one link in your article, and give them many good reasons why they should click on that link. Not one reason to click on 10 links, that’s not as effective. So choose your link wisely, and this also will prevent your email from getting vacuumed by the email filters.”
It looks pretty spammy if an email has underlined text everywhere that’s obviously meant to take the reader somewhere else. Let your email give information to the reader right then and there.