Direct mail spending by religious organizations that market to businesses will spike in coming years, with email expenditures increasing 51.8% each year, and Internet spending climbing 45.8%, according to Direct Marketing Association (DMA). Religious organizations spent the most of all four nonprofit sectors on direct mail advertising in 2007, at $1.3 bln, and on insert media, at $29.3 mln. Educational services and religious organizations tied for the top spot in 2007 in Internet advertising expenditures, at $161.6 mln each.