There are companies that harvest and sell the directory information — including email addresses — of scientists, researchers, college and university faculty, and many others.
One of these companies is India-based SciD@T@. The company’s tag line is “Pharma Biotech Data Solutions,” and its motto is “a global biotech data provider.”
These phrases gild the company’s true mission, which is to collect and sell email addresses to companies that use spam email in their marketing.
They sell their email address both by field and by country. Clearly, many of the predatory publishers on my lists have been clients of this company or its competitors.
So, if you’ve ever wondered where someone got your email address, companies like this one may be the source.