Over 3 million businesses are using social media, with a 50% increase in Twitter usage year-over-year and a 200% increase in company blogs. While social media ROI is difficult to measure, some companies have reported positive results, including Dell associating $3 million in computer sales to Twitter and Domino's attributing a 4 million profit increase to social media marketing. A study found that 71% of businesses plan to increase their social media investments by an average of 40% due to the low costs and ability to gain traction online.