I have a small senior dating review site. Keyword phrase gets about 12,000 exacts per month. My website ranks nowhere on Google but at the top on Bing and first page of Yahoo .
This sites does not make me a fortune but daily makes around $2 with a fantastic CTR of 50%..
My point is dont forget about the other search engines.. especially for certain niches.. I think perhaps in this case, because the keywords target an older demographic..maybe Bing is used more often by older people, since it comes as default with windows explorer..
Anyway whatever the reasons folks you can still make money without Google..