Perhaps because Les Moonves even admitted he was a bit worried about GA taking a chunk of CSI/V's audience, so they want to keep the show foremost in viewers' minds by saturating the network with the Vegas promo? It's still their biggest cash cow after all, and they want to keep it that way. But yeah, I'm disappointed to see much less advertisements for NY - although I've been seeing them at odd times, when I come home for lunch and turn on the TV, I'll see NY ads during soap operas or daytime talk shows, and I saw one very late last night before going to bed, about 1am. So they might be showing as many NY promos, just not during prime time...