A 30 second ad is a very long time, internet wise, but I do like the idea of ad free for the rest of the site.  The animated ads in particular are a huge nuisance for me when my connection is having issues. 

Perhaps a cut down to a 10 or 15 second front door ad, or possibly, let a single company sponser all the ad spaces with flat, non moving ads that link to their 30 second ad or web page? 

The "front door" ad, also, may be confusing to people.  They may wonder where in creation the link they clicked led them to.