I have a hub that has had 7 pageviews in the last day, but has had 282 slideshow views in the last day. I can see one or two people clicking on the pictures more than once, but not 7 people viewing the slideshow 282 times.
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That's what confused me, too: to get to the slide show, you have to view the page. But, as has been mentioned above, perhaps slideshows are accessible separately by search engines like Google images?