Determining the number of backlinks to submit (“link volume”) is part of the initial research that we take on for each and every client. We don’t just roll out an automated program and blast your website into oblivion with endless backlinks.  We average backllink volumes so they relevant to your industry.  Bigger business vertical clients get higher volumes.  Smaller industry clients get what is relevant for their smaller industry.  Bottom line, it depends on your particular industry.