I've got a whole bunch of alternative freebie orchestra bits and pieces. I also have East West CCC, as well as the new Albion II Loegria library (Which is wonderful), but you can never have enough of these samples. I've run into situations where the freebie one has just the right amount of vibrato, or it's been recorded with a specific mic that let's it sit in my mix without much EQing at all.
So even if you are as sample rich as, say, Blake Robinson, it's still worthwhile grabbing these things while you can, you never know when you might need that one anvil hit in there!