Greetings from the Critique Club!
This is a great shot (especially for a stock type of photo). It is clear as to what the subject is, the black background really helps to make it jump out aat you. The motion blur in the cards also another great way to show the movement that is happening.
My only possible criticism would be that the light on the thumbs is a little overexposed, after shooting could dodge them a bit to balalnce out the light or while shooting use a greater aperature (higher number)
Over all very well done congrats on your well placed finish!
Keep shooting!
would have been great if you could have captured the action of cards folding into each other before they were stacked at the bottom. not sure if that makes sense. but hopefully you know what i mean