I often find people speaking about microniche sites and getting banned on adsense. I would like to say that this is a wrong conception. If you have 10-20 microniche sites and want to make money with adsense then you have to provide good information and keep your blogs updated frequently. People generally target a single keyword and purchase EMD's and try to make money with adsense, their websites have only 4-5 articles and they start building backlinks and trying to rank for that keyword. If they acheive #1 on google they leave that website and purchase another EMD and start ranking that website. Google doesn't like these kind of websites and tags them as MFA. To overcome this you have to make your websites as authority, Google loves these kind of websites. If you are going for a Keyword like "chemotherapy side effects" with and EMD, Always make sure that you are writing articles about "chemotherapy side effects" as well as other articles on "chemotherapy" . Your sites should be like "One stop shop" where you get all the materials under one roof. If you check in Google keyword tool for chemotherapy you will get more then 400 keywords. Build websites and keep updating it weekly or biweekly. I have seen webmasters making $60k per month with more then 300 websites and all linked to analytics and still google doesn't ban his adsense accounts. His microniche sites have more then 400 articles providing updated information regularly. Instead of ranking for a single keyword they try to rank 10-20 keywords from a single website. Update Your websites regularly or weekly>Try to rank for multiple similar keywords> Make more money Anybody agree what i say.