Upgraded: Your ability to earn lots of British Airways miles Chase and British Airways have launched a pretty amazing airline mileage-earning credit card offer.50,000 BA miles after one purchase, then 50,000 more after spending $2000 within three months.Gary Leff has thought this through and come up with a scheme for 420,000 miles between two people.Thats a lot of free tickets for a $75 annual fee. Downgraded: Track suits A Best Buy executive says that United refused him an upgrade because he wa