The general guidelines Rok Hrastrnik has provided state that article title must link back to original article. If RSS feeds contains a complete article only an excerpt, Rok suggests 100 to 200 words, can be republished. A link should be provided to article source, website of original publisher.

Further to this it is suggested that no archives are kept on republished site and no full articles are used. I would suggest permission is sought from original author if you wish to keep an archive on your site.

You can follow this discussion further at PR meets WWW and Micro persuasion.

The key point is that click fraud is already taken into effect when advertisers select highest amount they will bid. For instance, there is no difference whether an advertiser pays $0.83/click for 121 clicks with 21 being fraudulent, or $1.00/click for 100 clicks when there is absolutely no fraud. In either case, advertiser pays $100 and generates a profit of $20, and Overture and/or Google make $100. What changes is advertiser’s yield (e.g., percent of clickers who purchased book) which in turn effects their highest bid price. That is, with fraud, 30 out of 121 clickers (24.8%) purchased book, and without fraud 30 out of 100 clickers (30%) purchased it. Without fraud, bid price in an efficient market will rise from $0.83 to $1.00.

In summary, online advertisers must focus on analyzing and improving their internal metrics (e.g., conversions) and not worry about click fraud as it is already incorporated into keyword bid prices. Hopefully, frivolous lawsuits and refund requests spawned by apparent click fraud will end as those in industry recognize this undeniable fact.