They probably did something for the site. For instance
promoted it elsewhere, possibly on their own sites if they in fact
have one or maybe they paid money. Who knows? Or it could
be they are in tight with the people who run RV. Four of those are
music pages i'm assuming, so it's not exactly spamming like it would
be if you leave links to other competing rap boards. The other two
aren't really boards so they probably are just promoting RV throughout
the net in exchange for their banner here.

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chillin' like refrigerators