you have a site called siteA which you are trying to rank. you dont want your competitors to see your backlinks so you get a siteB and build all your backlinks to siteB. my question is, what are the requirements for siteB? does it help if it's an EMD? If siteA is about plumbers, does siteB also have to be about plumbers, or could it be about video games? does the content of siteB have to be real and high quality, or could it be spun garbage?