I have a few strong domains that were on whitelabels. These got hit with a manual penalty (not just mine,everybody using them). The reason was given as thin content(Despite 36,000 pages. Go figure!) I kind of understand why though as everybodys was pretty much the same,sometimes the whole of page 1 was the same WL. Since the penalty I have removed about 5 from the WL and put them through for manual reconsideration. I have added about 8 pages,each with between 600-1000 words. They all come back as still violating the guidelines. I would like to save the domains as they are very strong but I dont want to waste a lot of time on them. Im wondering if I could make a sub domain of the main domain,eg test.mydomain.com so I can keep the domains strength. I wouldn't be redirecting the root domain as due to a few tests I have done in the past Im pretty sure the penalty passes on. What is everyone's thoughts on making a subdomain?