IMO the music should be played on the original format of release, whether that be vinyl, CD or MP3. Promoters should ensure that the equipment is available at their promotions. In the past I have cut carvers of unissued tracks only available on CD, I have done this because you cant guarantee a CD player at NS gigs, if there was I would play the CD.
With regard to the CC gig in question, what do you expect, personally I never attend these events for that & many other reasons, these events have no relevance musically anyway & just serve to ensure the promoters continue to make their living from the NS brand.
Lastly, there is another side to the OVO saga, one that the wannabees have a vested interest in promoting/continuing, that is the old chestnut that people dont care what format & many other such lies that ensure they have a good excuse for not playing the originals they cant or wont search out, but allowing them to continue with what they think others believe is a legitimate promotion or 15 mins of fame as a local yokel DJ...these people will always be seen for what they are, by the genuine hard core soul fans & they can bang on forever, but we all know the truth......
Keep it real & dont sweat the $$$$ promoters or wannabees, we'll be around doing the right thing long after they have disappeared again.
Best Russ