Interesting article by Mark Jackson over at Search Engine Watch, discussing the issue of paid links (directories, social media, press release etc.) Below is a small snippet from the article:

“We can assume anything that says “Sponsored By” on a Web site is most likely a paid link. Or, if there’s an area of a site that says “We Recommend” or “Supporters,” that’s probably a pretty good indication of a paid link.

But what about…”  Read the rest here.