Visit a National Trust property, 2 for 1 pricing

in the UK via a promotion with the Daily Telegraph:

2 for 1 at National Trust
Explore some of Britain's most beautiful heritage sites with this fantastic summer discount. There are more than 250 National Trust houses and gardens across the UK for Telegraph readers to visit with this 2 for 1 offer. ...

How to claim
Cut out the voucher printed in paper on Saturday, June 7 or Sunday, June 8, 2008. Take the voucher to the attraction of your choice to claim one free adult or child ticket when accompanied by a fee paying adult. Click here for information on participating National Trust properties.

Can we say New York Times or HGTV and the National Trust for Historic Preservation?

Umm, marketing...