Links within a Press Release Don’t Matter Anymore: Google
Googler John Mueller, in a recent video hangout said that Google’s algorithm doesn’t value the link(s) found within a press release. He cited that since most of these links are often from the company, so the algorithm doesn’t consider them natural and ignores them.
He clarifies that neither these links hurt you nor benefit you. To note, in past, Google had recommended webmasters to tag no-follow with the links within press release since the search engine conglomerate consider them unnatural.
They also added fresh link schemes guidelines a while back. Even ex-Googler Matt Cutts once said these links won’t help you.
Thus if you have many press releases to shoot, note that links within them won’t help or hurt you unless they are spam.