i guess backlinks from a pr 0 or gray reduces the pr of the website as this page for example so better not write the website in signature how far do you agree
Generally backlinks from Digital points are not very important though it is counted because the PR is Gray. The only think you can get is traffic and that too i don't think will be a relevant traffic
I think they all count as backlinks. However I'm just not sure how much weight each link actually brings to the table.
theyre all counted all right, just not a great deal. But still better than none. Backlinks from 0 PR will not bring your PR down
No, not every post at forums is being indexed so is your backlink. links at signature is more for traffic than search engine ranking. To get a higher ranking you have to widen the scope of your link building campaign, rather than just focusing on forums.