Some SEO companies may promise to get content from your site to the front page of social media sites like Reddit and Digg. They may tell you that they have a bunch of people working for them who will vote for your article in order for it to get to the front page. Not only do these unethical practices risk getting you banned (because it’s obvious when content doesn’t really belong on the front page), you won’t get much link love anyway unless your content is incredibly interesting and informative. But in that case, you shouldn’t have to pay someone to get it on the front page for you anyway!