MC once said that links from press release sites doesn't matter much, many agreed with him but still felt that the press release content picked by other reputable sites can still help. But still it can get you traffic by coming to top in serp. One of my competitor who has just posted a recent news on a press release site, his news item is coming on top for a keyword, and since the news contain links it brought the traffic to their site. Since most of reputable press release sites are paid, Is investing in press release site a good approach ?