When I signed up for the paid internet, (I pay for the sevice) I was told the silly advertisements would go away. They haven't.
I also notice that when there is an advertiser on the email and I block it, the spam comes back and will not block.
I use my own internet, and have a firewall but it doesn't stop the spam from ATT@T advertisers. I have about 100 items a day and it is getting so I am going to stop the service. Funny thing though, when I use the free Yahoo.com account I rarely get any spam.
PS this took 20 times selecting a board until it went.