Need a quick understanding in PR juice

Hello BHW member,

I have a quick question concerning about PR [PageRank].

First question: Most of the time when people offer backlinking service it is mostly Profile or Commenting backlink. But, when mention profile backlink or comment backlink on high PR5-6-7-8, it doesn't mean anything right? I mean the backlink is actually on a new profile which is PR0 or N/A, and comment are usually on new page/post which also have PR0 or N/A.

So this is some kind of marketing trick or it actually worth more a profile backlink created in a PR6 than a PR4?

Second question: If someone offer a PR6 backlink on an ACTUAL page with PR6, does it mean that the backlink is on the Homepage/Index page as most of juice on any website would be mainly on the Homepage?

Third question: I see a lot of PR chart/table saying how much is equivalent to how much PR. Most have written that having a true PR6 backlink to your site give your site a PR4...Isn't that too good to be true?

Here is an image of the table:


I look forward to all SEO people to speak up about this topic.

Thank you in advance

Chungy

I think people are just guessing. Those tables dont work.

Ah ok thanks for the notice. I guess it will takes a while to understand a bit the concept

Profiles on high pr sites are much easier to index thats why its important. Angela E. said that they are better because they get a little juice/authority because its profile from high pr site. Well i dont belive this.
Second question : i dont understand for sure what you mean. If less outbound links on high pr page then its better, juice is devided between outbound links.