Searching to get links for my new website, I found that many webmasters offer links from news aggregator websites in form of blogs. The content of these sites are news articles taken from several other sources, usually from well-known news agencies. Often such news aggregator website has descent PR. How does Google estimate quality of links from such sites? Will Google decrease value of such link, or not? Or may be Google totally disregard such inbound links when calculates PR?