Currently in February even with the rise of the difficulty its still one of the most profitable coins to mine with an Nvidia card
Can you elaborate? I feel like I'm missing something since you said that.
This is what I see:
Zpool Current Estimate: 0.01378 mBTC/MH/Day
Ahashpool Current Estimate: 0.01332 mBTC/MH/Day
I didn't see stats at the pools you mentioned, but it seems like there are a lot more profitable opportunities than BTX right now, unless my calculations based on the Current Estimates above are incorrect.