UPDATE: THERE IS NOW A PUBLIC OFFER FOR THIS:
IT’S VALID THROUGH SEPTEMBER 2ND.
United has offered 50,000 bonus miles + $50 credit from time-to-time (and targeted), and it appears that offer is back for some users (including my father, who received a piece of mail with this offer). You also get 5,000 miles for adding an authorized user.
To see if you qualify, clear your cache, then log in to your United account. Then visit either of these links:
The terms of the offer allow you to get the bonus if you’ve had the card more than 24 months ago, (which I don’t remember ever seeing on a Chase card):
[Bonus is not available for] previous cardmembers of this consumer credit card who received a new cardmember bonus for this consumer credit card within the last 24 months…
Also interesting was that on that landing page there was a link to an offer for the United Club card – which gets you a year’s access to the United Club – for free for the first year ($395 thereafter). I haven’t seen that offer in quite a while either.