You can cancel your automatic renewal by hovering your mouse pointer over your name at the upper right and click account details in the drop down menu. Scroll down to membership payment details and the box on the right that says next billing date has...

     

They would be better off just getting rid of these spinners. It's a nice idea, but they are poorly done. They bog down when the site is busy and are misleading. The old way was quick and simple. And it's not a ripoff. I've won many times.