HubSpot, a B2B marketing software firm, said its Facebook ads during Q1 2012 lifted its sales from the social site by 71 percent when compared to 2011 overall. While the company wouldn't divulge spending comparisons for Q1 vs. 2011, Dan Slagen, head of paid lead generation efforts for the brand, said ROI for the Facebook ads was 15 percent better than other digital efforts during this year's first quarter. He also said traffic driven to HubSpot.com from Facebook.com increased 39 percent because of the ads.