Hi,
Our linkbuilding efforts have resulted in acquiring a high number of backlinks from domains within a C-block.
We all know Google issues penalties whenever someone's link profile looks unnatural. A high number of backlinks but a low number of linking C-blocks would seem to be one of reasons to get penalized.
Example: we have 6,000 links from 200 linking root domains coming in from 100 C-blocks.
At what point should we start to worry about being penalized/giving off an unnatural look to mr G?