If you had a browser that automatically created links to products or sites of interest as you browsed, maybe based on your preferences, maybe not (a Yahoo-cum-Office Assistant...), would there be copyright issues? The person browsing knows that red (whatever) links are added in by the browser, and weren't part of the original text. No-one who wants the unalloyed text (or to avoid advert links) need to use the browser. And the text itself isn't changed in any meaningful sense (more than changing graphic preferences, surely). Isn't this pretty much what Deja are doing? The links are plainly part of the text. You don't need to use Deja. And the original text can be read "as" originally intended by not following (or seeing the URL of) the links.
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If you had a browser that automatically created links to products or sites of interest as you browsed, maybe based on your preferences, maybe not (a Yahoo-cum-Office Assistant...), would there be copyright issues? The person browsing knows that red (whatever) links are added in by the browser, and weren't part of the original text. No-one who wants the unalloyed text (or to avoid advert links) need to use the browser. And the text itself isn't changed in any meaningful sense (more than changing graphic preferences, surely). Isn't this pretty much what Deja are doing? The links are plainly part of the text. You don't need to use Deja. And the original text can be read "as" originally intended by not following (or seeing the URL of) the links.