Just got this e-mail from United
Dear Mr Michael Cordelli,
Since you've just used your miles for an award, we are pleased to extend this invitation-only offer to you. Apply for a Mileage Plus® Visa® card by Chase and take advantage of our biggest bonus mile promotion of the year. You'll earn 50,000 bonus miles1 - enough for two free roundtrip tickets within the continental U.S.2 - after you spend your first $250.
And for a limited time, we'll waive the $60 first-year annual fee.3 That's a Plus.
With a simple online one page application on the link. It was prefilled with the dempgraphic stuff, just had to put in income, social, and how long at home and job.