They offer the most flexibility because you don't need to deal with award flights (booking flights with points / miles) or airline loyalty programs. (wisebread.com)
It is exciting to see them adding global airlines; no matter where you want to travel, you'll have options for flights with points. (upgradedpoints.com)
For the last part in the booking award flights with points and miles series, this article will focus on the award flight search process. (pointswithq.com)