Interstitial pages with ads on websites are annoying enough, but this is taking it to a new level. When I (and I'd suspect lots of others) click a link, I'd like to be taken directly to that resource.
In fact, a day or two back there was a story posted to HN that went to a kiw.is link. My gut reaction was, "WTF, where's the article. Oh there it is. Wait?! That was a 3rd party interstitial? Whoever submitted that link is a jerk and a half."
So I guess what it boils down to is that I believe anyone who knowingly inserts an interstitial that could otherwise be avoided is a jerk and a half. Though, that's probably your target market; new media douchers for lack of a better term.