In episode 67 of Semantic Mastery's weekly Hump Day Hangouts, one of the questions asked was about the impact of using press releases on diluting anchor text density.
The exact question was:
Hey guys. Could you briefly explain to me how press releases help dilute anchor text, when 90% of the links you get are nofollow. Does the anchor text count towards your backlink anchor profile but not for ranking a particular keyword since the press links are nofollow and don't pass KW relevance? Thanks again. ?