Dude..it's not about PR that tells us how much a site earns. It can be 0 or $10,000 per month, PR0 or PR8. Yes, do-follow backlinks affect your Page Rank. No follow maybe help 1% at it.
Depends on the site, what it is about, the content, quality, etc. Lots of factors involved. A high ranked pr site may sound good, but some lower pr ranked sites get more visitors. Traffic is the key for adsense. No traffic or very little = low adsense or no adsense earnings. If nobody visits surely no earnings. People chase pr, which hasn't had a major update in forever. A good combination of pr, or lower pr site and traffic might be better than a high pr with low traffic. Pr can sometimes bring traffic and adsense earnings if it is of quality, helpful, and a overall useful site. But, sites with a ton of spammed backlinks just to gain pr generally will not last or out perform a quality site in the long run.
PR doesnt directly affect your earning Some people making thousands from PR4 site and some people might earn nothing from PR4 site
Unless your website is well optimized ,you can not earn from Adsense. Backlink is not the only factor but one of the factors for well optimized website.You can also earn through email marketing . so more visitors can come and click on ads.
Its the quality of traffic + the niche of the site which decides how much you earn. PR has absolutely nothing to do with it Ani
I use to think pr=$$$ but I'm finding out the hard way this is not the case. I have a couple of sites that get 10 and 20 thousand views per month but the ctr and earnings are terrible! I know there is a formula out there, I just haven't found it yet.
It depends entirely on the amount of traffic you are getting my friend, nothing to do with Page Rank.
I think it depends on your website niche and how many visitors do you have ? If your website is Pr4 but it is very low traffic , it properly could not earn a lot money with Adsense.