A bit more on this. I did a little digging around as if I were a potential advertiser.
At the bottom of the adertising campaigns page I came across this:
"Benefits:
- Sent to over 23,000 registered members
- Gets sent straight to their inbox so can't be missed "
I don't know if there is a choice in this matter but I don't want these emails. It's not so much about the initial advertiser as the probability of email address propagation. I don't recall consenting to this but I acknowledge that, like most people, I don't read T & C's too thoroughly.