Maybe I will disappoint you
But it is truth you have to know technically how it works.
If this page is hosted in any server, let’s say in the root of moffed. So it is not a part of any website, means it is hidden page, this technique can be considered as DOORWAY.
MOST OF SEARCH ENGINES RECONIZE THIS TECHNIQUE
The spiders follow any link and any page to its source, lets say this page for example
the google spider will follow it till will not find any resource of it I mean no link to it from any website and the content is not appropriate to any keyword and spiders will ignore it, and if spiders discover it fake page and this is what will happen, it will penalize all the website linked to it
and this page will guarantee only one thing: BAN AND PENALIZED BY GOOGLE SPIDERS AND OTHER.
DO YOU KNOW THAT GOOGLE SPIDER/CRAWLER RECONIZE THE LINK EXCHANGE FARMS AS BAD WEBSITE?????
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The only solution is:
Links and links back from each website to other. The normal way