Yeah - I booked a YYZ-EWR run which I probably won't be able to do (I paid 0$). So I hope that the T&C that said the following refers to cancelling completely and not just no-showing...
Any portion of the package which is cancelled will make the coupon null and void and the full amount of the package will be charged to the credit card.
http://www.expedia.ca/daily/voucher/save300.html