6 - Legalities & Copyright
Some people may be concerned about this method. Isn't it stealing content? What about copyright issues? What if the previous domain owner wants his content back?
Now all of these concerns can be addressed quite easily. If somebody ever did have a problem with some content you have scraped in this way and wanted you to take it down – you just take it down. There's absolutely no need to worry about it.
But what are the chances of that happening? The content is coming from a domain that has been abandoned, in many cases, many years ago.
Unless you are using this content somewhere prominent like a money site, the chances are that nobody would ever see it other than Google anyway. If you put it on a PBN, use it for some tiered link building service and so on, it will just never get seen.
Even if you did use it on a money site, there is still no way of anybody knowing that you didn't create the content yourself or get it written.
Because this old content is not in Google's index, it cannot be searched. Once you re-publish it to your website, it becomes content unique to your domain. There is no tool out there that can look for copies of it on the Wayback machine.
The only possible way it could ever be detected is if the actual person who wrote it all those years ago was to somehow arrive at your new website and recognize the writing.
It's just not going to happen!