OK, well that changes things. This wasn't immediately obvious from the page linked, nor the demoscene link[1] contained therein. I understood from that page that the links to ADA, Pouet etc. were sources of demos with copyright holder permission (I'm not actually sure this is 100% true), not that Cloanto had sought permission from the demo creators in question for their blessing to bundle their wares with Amiga Forever.
I can't actually find this list of demos in the documentation though, is it online?