I think theres a limit of goes you can play cliff hanger so the answer would be yes I have a program knocking around somwhere that auto plays, i will try and upload it.
Actually, I think there isnt a limit, since they don't stop allowing u to play, they just stop giving u nps for winning (after u win 1500, every day). So since u can play forever, I guess that means there's no limit. im not 100% sure though.
Thanks for your answers guys but it seems there's no 100% sure answers so it would be interesting to test it out =D