Link did not work for me at first - My United account had 0 miles.
I then transferred 46 miles from OnePass to United - cleared cookies - logged into United (now showing 46 miles) - click on link - and viola - the 60K offer appeared.
No instant approval - no doubt I have too many Chase cards at the moment and will need to do some negotiating. I would like to keep my existing Continental card as its about 7 years old, but if I have to, will allow Chase to close it down to get the United card.