BHW Footer Numbers

Hello Black Hatters,

I was just wondering about our awesome community and the purpose of the footer numbers, 1 - 81. As I investigated all of the number links are nested under blackhatworld.com/blackhatseo/sitemap/and are sitemaps of each individual forum. I'm assuming this is a good SEO tactic because BHW is using it right? Haven't really seen anything else like it and thought I just would ask and end my curiosity.

Drink Up,

Mr Vodka

Yes. its a sitemap.

Those numbers are sitemap of the this forum. I am not sure why admin of BHW has added sitemap like this format?