Actually, that is not what a press release is.
That is spaming press releases, and exactly why all the press release sites have been hit so hard they are junk links.
Press releases are not articles, they do not "sell". They have a specific format to follow, and they are designed to announce NEWS.
A press release is a public announcement of newsworthy information about your company. It should be a press release, not an article posted on an article mill.
If it is not newsworthy, it is not a press release, and it will not get picked up by the news feeds.
Putting fake press releases on press release sites will not help you rank.