I guess you have an opt in mail list and I've never seen any one make much $$$ for paid email websites plus anyone can buy and setup a website to advertise unless yours has millions of hits at your website it would be a hard market to crack! There is quotes below which I like good luck. I make a few dollars through affilate sale have you tried that if you have 10 website getting a bit for traffic you sould be able to make some good money from it in a good way
P.S I learn't the hard way about email marketing and advertising I lost money and some great affiliates because of it. Just some free advice I'm not trying to be mean
1. Nothing in the Constitution compels us to listen to or view any unwanted communication, whatever its merit…The ancient concept that a man’s home is his castle into which not even the king may enter has lost none of its vitality…We therefore categorically reject the argument that a vendor has a right under the Constitution or otherwise to send unwanted material into the home of another. If this prohibition operates to impede the flow of even valid ideas, the answer is that no one has a right to press even good ideas on an unwilling recipient. That we are often captives outside the sanctuary of the home and subject to objectionable speech and other sound does not mean we must be captives everywhere…The asserted right of a mailer, we repeat, stops at the outer boundary of every person’s domain.
2. If you cause people to think twice about engaging in some business transaction over e-mail for fear it will cause more spam you are putting a damper on the growth of what is an incredible global commerce and communications medium.