The promo is tiered so the more miles you purchase the better the bonus becomes. In addition to the bonus, you’ll get 1 or 2 entries into a contest that will award its winner 1,000,000 miles which is plenty for a few First Class roundtrips on Lufthansa!
The brackets break down as follows:
If you buy between 5,000 and 14,000 miles, you’ll get a 25% miles bonus and 1 entry into the sweepstakes.
If you buy between 15,000 and 29,000 miles you’ll get a 50% miles bonus and 1 entry into the sweepstakes.
If you buy between 30,000 and 85,000 miles you’ll earn a 75% miles bonus and 2 entries into the sweepstakes.
In doing the math you’ll pay about 2.8 cents per mile (CPM) if you buy between 5,000 and 14,000 miles (plus 25% bonus). Buying between 15,000 and 29,000 miles (plus 50% bonus) will give you a CPM of 2.3 cents. Buying over 30,000 miles (plus 50% bonus) will net you a cost of 2 cents per mile.