Let's steer this away from the particular site mentioned.
Back in the day, it was fairly common for forward-thinking webmasters to include sections of keywords that weren't mentioned directly on their page, but were highly relevant to the content. In doing so, they enabled people looking for the pages to find them in basic keyword searches.
Anyone remember Google using keyword lists in title on their help pages a few years back? It was to make pages easier to find using a Google search appliance.
These days, the search engines believe that they do not need crude measures such as these to determine relevance. They are unlikely to appreciate any obvious effort to sort out relevancy for them. Thus, the line between a webmaster's efforts to reach the right audience, and keyword spam has become very thin. Some sites get away with pretty blatant spam, others are punished for seemingly minor (if, with experience, misguided) efforts to increase relevancy.
What's needed is balance, and an understanding of context. Dumping a pile of keywords at the end of a an untrusted page on a non-authoritative websites is more likely to cause a ranking drop than be the trick that secures stable rankings for desirable keywords.