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I've seen at least 2 domains pointing to one site and both enjoy the following;
1. both PR6
2. one domain is a backlink to the other domain :(
3. there are URLs that were duplicated and currently in the index.
Is it spam? Nope, just happen that the other domain was parked on another domain.
I wonder, if I parked say 20 domains in one site, what would happen?
if there are two domains with PR6 each, that means people are linking to both.
While it might sound cool at first, keep in mind if everyone linked to one domain instead of half and half, he might be PR7 instead.
Also keep in mind with the same content, both sites will rank for the same exact topic, and since both have PR6, it's not really going to expand the coverage for the websites.....
overall, it's still better to play by the rules.
It's not something that's easy to ferret out. Even reverse whois won't *necessarily* turn up the culprits. Seems like you'd have to ping every site in your index, flag the overlays, and then possible have a human look at each individual crossover situation, many of which are quite legitimate.
Witness:
[webmasterworld.com...]
vs
[webmasterworld.com...]
Does webmasterworld.com have pr that www.webmasterworld.com doesn't have - or vice versa?
2nd site discovered normally will get lower PR and flagged as dupe content.
I didn't say there _weren't_ ways around that.
In theory, that would seem to be logical but the fact is the parked domain is a backlink to the main domain which means it is being counted as a vote to the main domain.
Secondly, whatever backlinks for the parked domain has nothing to do with the content of the main domain :) The secret soup here is simply the parked domain was once an active site but now deactivated.
The process was unintentional, the owner simply deactivated the other site. The weird part is...since it is still a valid domain, it continued to retain its old backlinks. The owner without knowing it, unintentionally parked this domain to one of his domain thus benefitting from PR point of view. All this without the owner prior knowledge or expectation.
In fact, the owner expect the worst, that this retired domain would lost PR, backlinks, and traffic from Google. In short, a dead domain, not expired, just simply dead.
Logically, Google, if content was factored in the algo, would have killed this domain from the index simply because it no longer represent its old content or at the very least have flag this for duplicate content.
But the fact is and been going on for several months already, this dead domain continued to enjoy its old ranking within Google's index thus bringing traffic and PR value to the domain where it is parked.
Is this the fault of the domain owner because he/she parked this domain to another site? Or, do we idolize Google's algorithm so much that some of us believed to a point that the algo is infallible?
I'm just giving an example of 'what is happening' at Google as opposed to postings of 'what is suppose to happen'. Big difference.
Cheers
The greatest example we have seen is one guy with 70 plus domains - all hosted on a Free hosting service all cross referencing each other. All are NOT using the same index page - but the content is almost identical on all his specific subjects.
Blatent - yes - but wait there is more! The tail of every index page has a full set of cross links hidden. Does it work? Hell yes - he blankets every travel search for his own content and has spilled over into neighbouring regions.
How does 70% of the top search results sound over the first 50 results?
What does Google do about it? Zip - they don't even know he exists. To the Google system he is a model citizen!
Food for thought!