This is the best publicly available offer we've ever seen for this card!
Brad's Deals Editor Mark,
Earn 50,000 miles when you spend $3,000 in three months with the United MileagePlus® Explorer Card. You'll also earn 5,000 miles when you add an authorized user to your account and make a purchase. Check your first bag for free (a savings of up to $100 per round trip) when you use your card to purchase your ticket. Enjoy priority boarding privileges and visit the United Club℠ with 2 one-time passes each year for your anniversary. There are no foreign transaction fees. Earn 2 miles per $1 spent on tickets purchased from United and 1 mile per $1 spent on all other purchases. Your miles don’t expire as long as your credit card account is open, with no limit to the number of miles you can earn. There's a $95 annual fee, waived for the first year.