Why are we dumping energy at wind farms?

Were we not told they are built to just produce energy?

Turbines routinely seen spinning on no wind days.  view movie

What in the world is going on here? How much energy is wasted this way?

Are they burning up wind energy from other farms and solar panels that add too much energy to the grid it cannot be used?

How could that be our leaders would never lie to U$.

It must be magic pixie dust being blown by one of those climate gods.