Who is doing the greetings for spam?

I received an "offer" from marketing company MRG today. Opening line is "Jan,".

Nobody calls me "Jan". I don't hate it, but I don't respond to it. I've never been called that name. If you want my attention, call me "Janis" or "Sweetie Girl". And if you don't know me at all, I prefer to be called "Ms. Gore". "Ms. Davenport" will do. I'll let you know when you can call me Janis, much less Jan.