As far as I can tell, this sale offer can be taken up only by residents of the USA. (I'll update this blogpost if I find a summer offer being made available in other Ancestry territories. See below.)
The sale price of US$59 (down from $99) excludes taxes and shipping.
To take advantage of the discount offer, order your kit before 11:59pm on Monday 20 August.
UPDATE, 13 August: 25% discount offer for researchers in Ireland and UK.