Use one ad per webpage, blog and use a few SFI gateways. That's how I operate. It keeps my readers guessing for what they will find at the end of the click of the link. That way they will come back if only just to see what something else they can come up with!
I like to have a variety of inspiration, sharing my life and how I handle it, and sharing the business for my ads. It will keep them guessing and it won't be repetitious for them.