About 6 months ago 4 of my main sites were penalized manually by google. I am sure that it's a manual penalty because they told me. I got the penalty because of my blackhat backlinks. Google requested me to send them a list of all low quality backlinks, but as all my backlinks are blackhat I didn't give them the whole list. My site is still penalized and I was hoping this would expire sometime (as the google video says), but it's been 6 months already. Is there any way to get out of the manual penalty? Should I continue building links? One of the sites was a big money maker so it's worth spending some time/dollars on getting it depenalized.