I am toying with putting up a blog farm >20 unique categories on different subdomains. I do not plan to link spam either to build links to the farm. Also there would be no links within the blog except for navigation within a blog. The content would be primarily private label articles meaning they are basically all duplicate content. Of course it's safe to assume I'd grow it to a large number of sites, 50 or more. I would put ads on the websites (probably adsense or YPN) which would clearly tie me to the farm & identify the number to the SE's. I'm somewhat worried that there may be an algorithm/spam filter that will catch this & permanently penalize any site that can be associated with me, such as one I may make in 10 years. Ignoring the risk of the individual websites being dropped in the various search engine rankings, should I be concerned about this or any other risk?
If you put duplicate content and for example another 20.000 people have the same content google will ignore you and your sites will eventually die. Just begin writing one at a time and grow slow but safe because when you get your traffic it will be worth the trouble. Hope you take my advice into consideration Bye!
Why don't you take those 20 blogs and write 5 articles for each one, thats 100 articles you have to write but Google will rank you higher and you should get more traffic, then if you want to do it again post another 5 articles to each blog. Then once there are 10 articles on each blog start again.
It doesn't take a degree to write a link-worthy article. Write your own, make them informative and keep them simple. Get to what the user is searching for. Do your research so you're not spreading inaccurate information. While some sites may do well with duplicate content, its in your best interest to write something unique. One hour of your time writing an article and a little linking could pay over $1000.00 a year.