*If one person in every 2000 responds to them, then it's been more than worth the effort from their point of view.

*Sad, but true.   I don't know if I have had any assasinators after me, because I never click on anything that looks like spam, but I'm a bit disappointed that I have made only £450,000 out of my lottery habit today.   Usually, I expect to collect a few million squid at least.   It's hardly worth opening my inbox for anything less.