Cool! What do you call beta sculpts though?
The moulds thing is the kind of story that seems to confuse a lot of people. Moulds wear out very fast and have to be replaced often, so discarding (or "destroying" for added theatrics) is nothing special. In particular it doesn't prevent future production of the model at all.
Had they destroyed the greens and the masters, then that would mean they cannot generate moulds any longer, and therefore cannot cast the miniatures ever again. However this is not something they'll ever do given how valuable greens and masters are (even now for them since they convert some of the old masters to produce new PPP models).
As for the foundry story, I'd be curious to hear more about it. Rackham had their own foundry, and, like I said above, it wouldn't matter nor mean anything if the guys working there had "destroyed" moulds. But since they were Rackham employees, I don't get the costs and negotiation issue. My understanding is that it was just a part of Rackham that got shut down (for the most part) when money started to run low.