In the PR business, a million bucks is chicken feed, a few posters stuck up on fences and the sides of buildings like they used to stick up around town when he circus was coming.
When you also consider the fact that if they had done anything else everyone would know the iPhone encryption was all smoke and mirrors if the government wants your information, it's not only chicken feed, it's dirt cheap at ten times that price.
When the Government does it is not PR it is Propaganda. I however doubt they have cracked the iPhone, in any case it won't be mine I don't have a cell phone at all.