I respectfully disagree.  There aren't exactly a lot of reliable sources on poker blinds (at least according to the guidelines on a reliable source).  The page on homepokertourney is probably the closest thing - it's been around forever and has been used in a lot of the poker tournaments I've played in.  The other site has a tool for trying out different blind options.  From the external link guidelines: 

 * Is the site content accessible to the reader? - yes 
 * Is the site content proper in the context of the article (useful, tasteful, informative, factual, etc.)? - yes. useful, informative, factual 
 * Is the link functioning and likely to remain functional? - yes (they've both been there for years) 

 Further, integrating the content of these two websites borders on plagiarism in the case of homepokertourney, and is impossible in the other case.  Based on that, I think the page is more useful with the the links in place.  I realize this is the only page I've really edited.  I did so because I was looking for info on blind structures years ago for my own home tournaments, naturally hit wikipedia, and found the page sorely lacking.  Once I learned more, I expanded it, added some theory, and some links to sites that helped me out.  I even worked with a current editor to improve my contribution.  My edit is still the main edit to the page after the initial creation, and the links have been there for a long time, with no other editors seeing fit to remove them.  I left other edits to the page in place as I'm not trying to be the edit police.  Yours was the first one that I thought actually made the page less useful, so I reached out.  Not everyone is trying to link spam.