Your pool have probably been unlucky. You should normally get at least 0.025 at current difficulty.
Could be the case, so maybe it's still worthwhile atm.
I'm no miner so I don't know the amounts per mhashs. If it's still worthwile, use it while it is. That is going to end soon.
It should pay your electricity at 50M too, but you should probably not buy any dedicated CPU's. :-)
The longevity of the card is reduced, but you are still likely to switch it out by other reasons before it fails. (Still - the fan might need to be replaced before that.)