Are you just importing the database into GSA and letting it fly on your money-site. Or are you using GSA with a WAC database to build links to your second tier sites. I am assuming a second tier site is an article on a web 2.0 property or an article directory that you have written that links directly to your money site. What is the strategy you are using? WAC articles are fairly good. I hear stories that the WAC articles are good enough to fool Google so use them. I also computer generated content is not good to have pointing at your money site. Between Panda, Penguin and Pinocchio I can't tell.