Pop-up ad  (will pop up an ad based upon any number of days you set). 

You can set the pop up to display only the first time someone visits your website every 1, 2, 7, 30 365 or any number of days.   This one is set to once every 2 days.   This webpage pops up an for an XBox360 the first time you visit this webpage. 

You can test it out by deleting your cookies and come back to this page and the pop will display again.   You can change the actual pop-up ad to be any size you want, and you can allow or not allow scrolling.  This one does not allow scrolling.

BUY NOW  $9.99   Unlimited use.