I'd wager it's spam. #15 the same, but more obvious. Cocoontech ranks high in Google results, so that makes it a target for SEO's.
Within limits, I'm not bothered by spam because it's easy to just look at the source and discount appropriately, whereas a lack of follow-up is a pure loss which can't be filtered.
Any good solutions? I like the way stackexchange tries to manage these issues, but I also think a lot more can be done, provided there's the will to do it.