Common? Well, in research a few years back, i calculated that there are over 107,000 people who have earned at least one million miles in a particular frequent flyer program. Delta I beleive has just over 20,000 such members and you can guess that AA/UA have substantially more than that given the alliance picture they were into first.

2.1 million, my guess is that there are at least 32,000 such people out there......