Originally Posted by Jdoughs

Yes and no, linking them all up from the same domains just shows the search engine bots that they are all from the same network, and basically gives 0 weight to them. They wont count them as strong links if they are easily identifiable as coming from the same network or nest. They will not give you credit for linking to yourself, basically.

Much better off generating unique link patterns to each, then pushing the strong power to your "money sites". Which I would assume to be your main domain that sells your product/servive.