Yes, but they are starting to hate on a lot of urls in clickbank and merchants routinely add popups which adcenter is looking for regularly now (they weren't a few months ago, at least after you got your ad approved). Direct link at your own peril.... or you could slap up a (compliant & trustworthy) landing page in that cb product's general niche and get people on your newsletter. Then pepper them with all the offers in that niche over time. Plus then you have an asset, whereas if you're just flipping clicks when the merchant pulls their product out of the marketplace, you're starting all over again. For most of the niches in clickbank, the people are buying a dream they will usually not act on. They'll buy that dream again. Seriously - take this advice I learned the hard way.