Regan hit the nail right on the head this time!
I refuse to re-visit any site that throws unwanted (they all are) pop-up ads in my face. Pop-up ads are cheap insults to the intelligence of internet users.
I'm only here writing this message right now because the NewsFactor sites have not stooped to throwing pop-ups at me.
When I come across a "regular" (I believe they are referred to as "user-initiated," non-pop-up) banner ad that has a message that interests me or sparks my curiosity, I click on it, or not, at my own will. Regardless of whether or not I grab my mouse and make that click, I am more likely to remember the advertiser and the product or service they offer in a positive light. I think they call that "branding." Either way, I am not offended by regular banner ads.
Heck, like Regan alluded to, I'd much rather have the choice of acknowledging an ad (or not), than to have pay a subscription fee for all of the content that is currently free to me because of the revenue web sites generate from advertising.
I've read about some studies showing that pop-up ads produce high click rates. They must be counting the clicks on that "X" that's located in the upper right hand corner of the pop-up window, you know, the one that closes the window. I'm clicking on them 100% of the time.