[Kipper is King]

I've been entering myself and my folks in the Sport Chek draws.
My dad and I both were chosen for Game #4.

I was told by a friend that once you are chosen for a game, you are ineligible for the rest of the playoffs. Is this true? Also, does it make a difference whether or not tickets are actually purchased? Eg- If I bought tickets tomorrow, but my did did not buy any, would my dad still be eligible for future Sport Chek draws during the playoffs?