From few years I ran some indian music download websites. Some of my sites got good ranks but after few months ranks got down or penalized by google. Some big sites like songspk [Dot] io, downloadming [Dot] fm, Djmaza [Dot] life always in the search results. There are no unique content / big content in their sites. They are getting 400k - 700k unique visitors per day from search engine. Whats the secret of them? Can anyone here to help me? And if possible suggest me some perfect seo packages. Thanks.