index of: in google question ...

hello everyone, i have a question about google and indexes ... as i wrote in my beachtube thread i am always registering first index pages to google add url, then leave it some time to get into the results and then i develop the domains. i have a few of them. i tried every domain that got into results develop in other way. now i found that the best way to keep your possition is to keep there only index and make new "directories" that are links to sponsor. but, now here is the interesting thing that i dont understand. with the indexes i am at first to fifth page in few days. the site is there for next two weeks or so. then i update the index with links to sponsor, and what the hell! if i make the same changes on few sites, just the links are going to other sponsor, some site goes up, and some falls down from 4th possition to page 10+ ... is it that important where the links are going? i did exactly the same thing, but some sponsor fucked bad with my site, some sponsor helped. and i am talking about big sponsors, not some scat fetish that cannot help for sure thanks in any reply and opinion, wish you best with your sites!