Spamming Technique

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Anybody understand this link below? What the purpose of it is?

( product link shortened)

Hope that shows up, it's a biggie and one of many like it I found at
this site. It's used as some sort of spamming techique but I really
can't understand the point of it but it apparently seems to work for
them as their site is a pr7 and ranked number one in a very competitive

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