This feature was changed. Before you have set to delete inactive sites who are inactive xx days. Now this was changed to make them just inactive ( not listed on the ranking, its as you would edit a member directly and make him inactive, though not to be approved again, that approve list would get to big ). Once they have sent a hit in, they are listed again. They are not needed to be approved again, nor are they deleted anymore.
This was requested quite a lot, to not delete any members, but rather manage those who are inactive. And from there, edit, delete blacklist etc just like manage members