You also have the option of redeeming miles for 40 % of your award and buying the remaining 60 %, similar to a cash + points reservation at a hotel. (travelcodex.com)
Additionally, sometimes the value achieved for your points is different for Points + Cash reservations when compared with full points reservations, so it's always worth checking! (rewardexpert.com)
This new Cash + Points reservation requires the same number of points as before, plus an additional $ 199. (thepointsguy.com)