That's insane and it's still only the 3rd most profitable. So you have 14.6 installed and you dropped 14.12 into sgminer? I did this with 13.12 and 14.6 drivers last summer but I need to test this. The only reason I can think why one might not want to mine with wepaybtc is they have their sgminer configured to use 1 thread and crank up the intensity, so that may use more electricity, I'm not sure.
I should say that most of my miners are using the 14.6 drivers, but don't know where to get that driver anymore. I didn't notice an increase with the 14.12, but no decrease either. I agree, it is insane. It places it over the X algos, but not as good as some of the newer ones. I can't speak to what WePayBTC's electric usage is, and would be interested if you have a method of analyzing.
Edit: Changed my mind, it seems that I do see a decrease with the 14.12 drivers. 14.6 works best for me.