Alright, so I went and put together (well, made a bot that did it for me rather) a list of sites that are all PR 1-6, I can leave my link on all of them and they are all do-follow. That list is 650 sites long, but there is a problem/question I have that I don't really know the answer to. Of those 650 sites, about 350 of them are all on the same sub-domain. Think of it like this: blog1.wordpress.com - PR 6 blog2.wordpress.com - PR 5 etc. etc. etc. (they aren't actually wordpress sites, but they are something like that) I already made a bot that leaves my link on all of them (and if they remove it/it doesn't show up, then it does it again), but here is my question: How valuable are links that are all coming from the same sub-domain? Is it like having 350 backlinks that only count as 1? Is it like having 350 different backlinks? Is it worth it to have 350 backlinks from one domain but different subs? I know that they are all going to be coming from the same IP address, but since there are different sub-domains, is it worth me doing this?