Somewhere between a "good faith" release and an ashcan copy?
"Only about 100 copies of the four-CD set were produced, with sparse packaging and an insert listing the details of the set’s 86 tracks, all previously unreleased studio outtakes and live recordings from 1962 and 1963. "
100 copies is still very low, even for a grossly overpriced Dylan-obsessive-fanboy-milking release (there are plenty of them out there).
FWIW, I wonder if each of the copies has (somehow) been given its own watermark so that they can identify where any leaked illegal copies might have come from? Whether it would be practical to trace ownership and assign blame of even 100 copies though, is questionable.
(Reason I ask is that if they produced and sold few enough, it might theoretically be possible to stop the recordings getting anywhere near the "general public" even if they had- legally- "released" them. Especially if they'd (say) agreed to buy them back from the pre-arranged buyers, i.e. de facto record company employees).
So, while this gives the impression of being something akin to an "ashcan release" (*), one wonders that since they had to sell it anyway- and decided to sell 100- why they didn't just manufacture and sell even more of them and get the money anyway, even if that wasn't the reason for releasing it.
(*) i.e. Something released solely to fulfil a legal obligation to avoid losing rights, and not a "good faith" attempt to genuinely sell it. The definition might not apply precisely here, but the general principle is along the same lines:- http://en.wikipedia.org/wiki/Ashcan_copy