Well, I have a multi niche site with 22 sub niches in it. I used to promote every niche by itself and the main domain too. once one of the posts was ranked high but since google change the rankings got worse. I bought several packages of backlinks but it didn't help that much... Anyway now I don't know what to do in order to rank it... should I push every niche by itself or the main domain? and can u recommend me any good service which can do it? I have some money... Thanks in advance!