Happy New Year guys. I'm hoping someone could shed some light on this. Few weeks ago I bought an aged domain from Godaddy. 10 years old and had a PR2. I started building back links from high PR sites blog comments. Today I checked the site and it shows a PR3. Re-checked the same with different PR checker tools and all show PR3. Question: How come the site's PR increased this quickly? The manual back links that I built would at the best be not more than 50 (It was from PR3, 4, 5 ******** links). It's a nice start to the new year but I fail to find an explanation.