Links are the currency of the Web. They are the way attributions are made. In most cases, media companies would be better off if they could just get everyone who is copying their stuff to link back to them than by trying to extract licensing fees out of them or suing them. There is a lot less friction in asking for a link, and it doesn’t cost anything to give one out. Yet all of those links can turn into traffic, both directly and by imbuing the original source with higher search karma (i.e. a higher ranking on search engines).
Links may be the currency, but domain names are the gold backing the currency. This works because domains actually cost something.