You have 2 cards left in your deck. Playing sin prodder will not change the odds of you top decking that card, which is still 50/50 because neither player knows which card of the 2 is the one you need. Yes after the fact you will know if prodder would have won the game because he cleared the crap off the top, but it does not change the fact that you have a 50/50 shot.
This is the example people needed to understand that Prodder does not allow your opponent to manipulate your draws or affect your hand. I was going to try to get the point across but you've done so elegantly.