I wonder how many unsuspecting passengers have clicked on the prominent arrow to continue through the check-in process not realizing that it’s really an “Accept offer” button to upgrade to seats with a little extra leg room for $14? There is a much less prominent “Decline offer and continue” link in the lower left, which is probably not where most people look for the continue button/link.
Pretty clever marketing scheme United.
Click to see the full screenshot.
