I don't think they ever gave it a chance.
Had I been them, I would have tried it out on several routes to try and appeal to different demographics.
i.e. YYZ - PHX (the Snowbird / golf crowd and many business junkets)
YYZ - LAS (business types on the way to conventions)
YYZ - MCO (keep the kiddies entertained on the way to see Mickey and business types like those going to LAS)
Loved the comment about a UA 744 being ahead of anything.