Jaideemaak - 1:26 am on Jul 27, 2010 (gmt 0)
Hence, we very much welcome this feature and has been using it.
I can see the benefit as well, but it would seem to create another issue (unless I've got this all wrong).
If someone comes to your site through cache or a translator, then the top level domain displaying your site (and Adsense) isn't your normal domain.
If you don't have that domain in your list of allowed sites, then you won't get paid if someone clicks on an ad.
As Nutmeg pointed out, there are so many possibilities that it is impossible to maintain. And even if it were, we can only put 100 domains in the list, apparently.
One of my sites in particular has high international interest and people visit from all over the world. Sometimes they use a translator of their choice; and sometimes they use the Google translator I have included on each page to help international visitors who can't read English.
If my assumptions are correct, then I could be losing out on quite a bit of Adsense revenue.
Another site I manage has zero interest to non-English speakers. No one ever visits via a translator so there is no problem. It depends on your content and where your visitors come from.