United appears to be discounting domestic economy awards by 20%. This looks like an unannounced sale, with short haul flights under 700 miles in distance pricing at 8000 MileagePlus miles each way (instead of 10,000) and other domestic flights pricing at 10,000 miles (instead of 12,500).
In addition, United just posted a redemption discount to Asia which is 25% off North Asia awards and 22% off South Asia awards.