Flexible economy, premium economy, business, and first class fares earn 100 %, 150 %, 250 %, and 300 % of miles flown, respectively. (upgradedpoints.com)
They've also started offering more and more discounted first class fares. (rewardexpert.com)
This means cheap first class fares can be a shortcut to earning elite status. (upgradedpoints.com)