Stay to Play means that the tournament is requiring all guests and participants to use Pse Event Housing to reserve their hotel accommodations.  Not booking through Pse Event Housing may result in a penalty, which may be monetary or that your player's participation in the event could be affected.  The penalties vary by tournament organization. To inquire about the Stay to Play policy specific to the event you are attending, you are welcome to submit a support ticket here, and Pse Event Housing can provide you with contact information for the tournament organizers who can better explain their specific policies.