You guys calculate right, electricity costs are about 2.5$/rig and internet are about 1$ (Yep, 100Mbit is cheap in sweden). With 2 rigs this becomes 6$ which is obviously less than 10$. Why then charge 10BTC?

Neither my internet provider nor my electricity provider allows me to pay in BTC. Therefore I need to exchange those BTC to $ which with current rate will be 7$ - paypal fees = 6$. With one rig there will be some extra $, but the 10BTC was more like a guideline of the costs and not what I am taking as profit. I hope some of you one day see this good enough to donate to my personal bitcoin account instead.