The great Blumenthal answers the question about citations losing their effectiveness when it comes to ranking for your local SEO efforts.
I really like his answer. I would add 1 thing. Getting citations is good for ranking but if anyone ever visits that citation site it’s also a good quality traffic source as well.
So if there’s going to be eye balls there, not just search bots, still a good idea to get good citations.
Here’s the link to the article.