Backlink Per IP Rule of Thumb? | AMR Scrapebox

So there there are tools like AMR and Scrapebox that can be used to get backlinks automatically. However, for the general consensus, say AMR, how many articles do you blast to a directory for your site until you believe it wont be anymore of use?

I asked this because of the fact about same IPs and backlinks coming from them. Just wanted to know what the people at BHW do! :grouphug:

Anyone could provide a little insight? Even personal experiences would help a lot!

I don't believe that there is an optimum number of backlinks per IP. I do regular AMR blasts with different articles.. once every month, for example.