RSS technology offers a variety of opportunities to use search engine optimization (SEO) for content promotion. However, not all SEO is created equal. One of the "unequal" SEO strategies invovles what is known as black hat SEO. You can recognize black hat SEO companies by their promises of almost immediate results in sky-rocketing your company to the top of search engine rankings. While this may be the case intially, the results don’t last, as the unethical black hat can lead to banning, as pointed out by David Touri:

RSS technology can help you with white hat SEO techniques. These are ethical and result in good standings in three to six months. You may have to show patience, but the results will be more long-standing