I'm paying about 15 cents/Kwu on average in Belgium... But we have many companies and many tariff plans, so the actual price can range anywhere between 4 cents and 27 cents (extra charges do apply, especially on the "cheap" power distributors, you have to pay extra charges and have extra conditions, for example the cheap price is only during nighttime)...
You are right those "cheap" power distributors, or any "cheap" distributors in general, most of the time have tricky plans. However sometimes you can profit from them after reading carefully what they really propose. For example why not run your miners at nighttime?
In Belgium, it would make sense to run them at nighttime only, but in that case, your ASIC investment is only generating coins during 8 hours/day and during the weekend, i'm not completely sure you'd ROI when turning miners off 16 hours/day