Non-profits sent 2.92 percent more emails during the 2015 year-over-year, however, response rates dropped, according to Blackbaud’s 2015 Luminate Online Report. The research revealed that conversion rates were down 11.11 percent in 2015, as compared to 2014. The research included input from 685 organizations collected from July 1, 2014 to June 30, 2015.