I'm trying understand how I can control Pin to Target animation over time, so I have setup a super simple scene where i have keyframed the scale value of a pin to target contraint. My expection was the ball would drop at frame 31 when the scale value was a 0, but nothing is happening. Can anyone confirm why keyframing this value does nothing?

I want to control this with an animated attribute eventually, but thought a basic keyframe test would be a good start...

Thanks