From the Native Instruments site:
Native Instruments adheres to a philosophy of producing the best virtual instruments available as well as offering the best value for money. In keeping with this principle, we have reduced the price for both of NI’s most powerful and most popular products.
Benefit from a 20% rebate on REAKTOR 5, the ultimate modular studio, as well as on KONTAKT 2, the sampling powerhouse. Users of KONTAKT 1.x and REAKTOR 3 or 4 can also profit from reduced update prices.
More information at Native Instruments.