Juul’s electronic cigarettes. The company has been widely criticized for marketing its products to teenagers. :
SAN FRANCISCO — Silicon Valley’s investors have put their money in plenty of ethically dubious companies, including those that make addictive apps, surveillance technology or services that knowingly exploit legal gray areas. But an unusual thing happened when Juul, an electronic cigarette maker that has been widely criticized for marketing its products to teenagers, set out to raise more than $1 billion over the summer: Investors appeared to draw a moral line in the sand.