Put it this way,i have not once signed up for an internet marketing
newsletter but i receive about 5 each day.At the top they usually say
something like:You are subscribed to this newsletter because you
posted to our forum,posted to our ffa page,
in my experience, the FFA pages are the WORST. I submitted to less than a half dozen of them. absolutely NO traffic from any, but TONS of spam. The email address harvesters must live there.
From now on, I avoid them, even tho the extra links might possibly raise me in some SE's, it's not worth the amount of spam you get.