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...Does this mean that people clicking on the post from SERPs then quickly visiting the site to download the font as there are only 6 fonts featured in the post to download (due to six font they are not spending time)? -> Looks like. I would measure the clicks on the download links and calculate a conversion rate. To know how good the convert, i.e. perform the action you want them to do.

It's unlikely that they'll stop counting at all. I think that at least part of the value should still flow to the domain. i think it would be better if you could create a better version of those pages with good links and canonicalize the old ones.