@kev seriously, the only reasonable way to deal with those is just ignore (or mark as spam).
My question when I get those is always: okay, *why* do they want to boost their site ranking fast? Clearly they have some resources, and clearly they could invest them into producing good content instead?
The answer very often is: they're preparing a scam, and need a watering hole website with a reasonably good ranking.
I would bet that after a while the content there changes dramatically.
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