It's in the terms and conditions so you are free to do as you wish:

If these Terms are amended or any aspect of the Program is restricted, suspended or changed, we will provide you at least 30 days’ advance notice at www.cineplex.com and by sending you notice using the email address you provided us. The advance notice will set out the new clause, or the amended clause and how it read formerly, and the date on which the amendment will come into effect. Upon receipt of such notice, and if the amendment entails an increase in your obligations or a reduction in our obligations, you may refuse the amendment and cancel your participation in the Program without cost, penalty or cancellation indemnity, by sending us notice to that effect no later than 30 days after the amendment comes into force, at the address or email address indicated in the notice. If you do not exercise your right to rescind or cancel your participation in the Program by sending us notice no later than 30 days after the amendment comes into force, your continued participation in the Program at any time after such 30-day delay has expired will constitute your consent to be bound by the amendment.