Why is a link to where to play appropriate?  Should th blackjack article link to the Bellagio?  This is an encyclopedia.  Linking to sites where to play is not the point.  And encyclopedic article is.  Most of these links offer zero information about the game, but rather are just game screens on commercial sites using the Wikipedia as a way to troll for customers.  Additionally, if someone wants to offer pointers to where to play, then the only possible link is a Dmoz category.  The idea we should promote one where to play link over another is silly.