I've seen a lot of websites that do similar things and rank high on SERP's...
Sometimes this can be explained in some part by a good backlink profile, old domain / website, high amount of content (if the content is relatively original and varied), or because the niche is more receptive to this type of content (when it's something relatively common on your niche)... and other times simply makes no sense why things like this are working in Google for years without getting automatically or manual penalyzed.
Iv'e seen webs with so big keyword stuffing repeating a keyword about 500 times in the homepage, and being ranked in the top of Google for that keyword without seeing nothing internal or external of that website appart of this that can explain that awesome ranking. It's so frustrating knowing that this is penalized by Google and some of your competitors are doing it with impunity while you can't or at least you shouldn't...