Just a head’s up, I’ve found another way you might be targeted for a Chase United Explorer credit card 50,000 bonus mile offer. The generous offer is out there, but only for select customers. Frequent Miler reports that making a purchase through the Mileage Plus shopping portal might result in an email or mailed offer.
For me it was as simple as logging into my United account. When I pulled up the United website an offer of 30,000 bonus miles was showing at the bottom of the home page.
I logged in and it was still showing 30,000 (hadn’t occured to me to take screenshots yet) but I clicked through to see and the offer that displayed was the one I was hoping for — 50,000 bonus miles after $2,000 in purchases.
I went back to my United page and the 50,000 bonus miles was now displaying.
It appears that the offer is targeted though, as clicking directly on the Explorer 50K application link takes you to this page.