Much of what is on it is ripped from commercially available CDs, I think so no, it wouldn't be allowed here. Main st, Frontierland, Discoveryland etc - all from movies CDs etc and most of the Disney music stuff is either from the film soundtrack or music CDs (still available).
They've just collected it together and burned it to disc(s).
Some of it is also from the Forever projects as DLRP used a lot from the US parks.
Much of what isn't commercially available is here anyway.
It's a rip off!