I know this really doesn't have to do with ccminer discussions as much as nVidia mining/hashing in general, but I figured a good deal of people come to this thread to discuss the most profitable way to use nVidia power, so here goes: I've done a little trial run over the past day and a half of using Folding@Home to "mine" Curecoins, and I'm getting a pretty good payout (payout should be at about 30-35 or so Curecoins/day for my card's PPD; roughly 0.0035-0.0042 BTC/day at the current rate).
It certainly doesn't hurt that my GPU is folding proteins and helping researchers while using all that power, instead of doing random hashing, but even without those considerations, the profit margin speaks for itself (for reference, Bombadil's profit calculator shows my 3 most profitable mining options at: {TAG: VEIL | Name:Veilcoin | Algo: X13 | BTC/day: .00316889, TAG: PP9X11 | Name:Multipool X11 (PP) | Algo: X11 | BTC/day: .00302276, TAG: XMR | Name:Monero | Algo: CryptoNight | BTC/day: .00215359}).
I get about 250k PPD with my 780 Ti and i5-4670k, so folding might be more relevant to single-card/gaming rigs moreso than pure mining rigs, but looking into F@H couldn't hurt for other kinds of rigs (I'd be interested to see what a full 750 Ti rig with a mid-range processor could put out in terms of PPD)!