95% of the time, when I give up my email address in exchange for "information" or something free", it is a BIG red flag for me to expect my address to be spammed forever by the advertiser & whomever he shares my address with. I don't want that crap in my inbox that might make me miss seeing something important.
So, I ALWAYS use a throw-away email address for that stuff and if I never check that email address again for life, so be it.
Of course, I used to give my "primary" email address as they commonly ask for, but when it started to get crazy, I put a halt to it. It amazes me how marketers believe that's the smartest way to market. Because it is impossible for any stranger to have anything HELPFUL to say to me every freakin day.
I just checked one of my throw-away addresses set up just for real estate and it looks like about 10-15/day come in. Larry Goins sent 4 emails on April 19. Unbelievable.
When someone sends too many emails, whatever little trust I once had is considerably diminished - and that's putting it mildly.